380 BHP
25 October 2005, 07:03 PM
#2
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Originally Posted by mattyboyv5
so lads what am i going to need for a reliable 380 bhp from my 98 sti import ???
simple question = simple answers
Thanks mat
simple question = simple answers
Thanks mat
How simple was that!!
25 October 2005, 07:21 PM
#4
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something like this....
255lph fuel pump
550 injectors
adjustable fuel pressure regulator
ported or tubular exhaust headers+up pipe
decat downpipe
a good make 3" exhaust system
better turbo. A TD05/06 20G is a good buy.
Front mount intercoler ( or an sti8 top mount would probably do )
A mappable ECU Apexi pfc is cheapest and is quality for the money+mapping
A good induction kit ( or make your own
)
PFR7B spark plugs.
might need something to control boost, not sure if the map sensor on your model is sufficent. A manual boost controller is the cheapest way.
A knock link ( if you buy the apexi ecu and get the commander with it, you can do away with this )
think thats about it but I may have missed something..
255lph fuel pump
550 injectors
adjustable fuel pressure regulator
ported or tubular exhaust headers+up pipe
decat downpipe
a good make 3" exhaust system
better turbo. A TD05/06 20G is a good buy.
Front mount intercoler ( or an sti8 top mount would probably do )
A mappable ECU Apexi pfc is cheapest and is quality for the money+mapping
A good induction kit ( or make your own
)PFR7B spark plugs.
might need something to control boost, not sure if the map sensor on your model is sufficent. A manual boost controller is the cheapest way.
A knock link ( if you buy the apexi ecu and get the commander with it, you can do away with this )
think thats about it but I may have missed something..
25 October 2005, 09:07 PM
#6
Apexi FC ecu mapped by the Wizzard, AndyF
TD05 20g
550cc injectors/walbro pump
flowed headers by Harvey
Bigger TMIC or a Hybrid FMIC
3'' exhaust system
Engine breather system/parallel fuel lines/Optimax 98 octane + NF booster
A good clutch and box
From 911's thread
TD05 20g
550cc injectors/walbro pump
flowed headers by Harvey
Bigger TMIC or a Hybrid FMIC
3'' exhaust system
Engine breather system/parallel fuel lines/Optimax 98 octane + NF booster
A good clutch and box
From 911's thread
25 October 2005, 10:37 PM
#7
Yep; 407 bhp x 340 torque@ Well Lane and 370 bhp x 320 torque at Powerstation.
You need to use the 'right' RR to get the numbers also!!
I believe the Powerstation number as the stock gearbox is still fully functional after some fearfully blunt standing starts for 2 years.
It was only 9 months ago and a 2.5 seems the next stage
And a gearbox
And a paddle clutch
And another £3K + 1.5 + 0.5...........
Stop now!
Graham
You need to use the 'right' RR to get the numbers also!!
I believe the Powerstation number as the stock gearbox is still fully functional after some fearfully blunt standing starts for 2 years.
It was only 9 months ago and a 2.5 seems the next stage
And a gearbox
And a paddle clutch
And another £3K + 1.5 + 0.5...........
Stop now!
Graham
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25 October 2005, 11:41 PM
#8
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Originally Posted by 69WRX
something like this....
255lph fuel pump
550 injectors
adjustable fuel pressure regulator
ported or tubular exhaust headers+up pipe
decat downpipe
a good make 3" exhaust system
better turbo. A TD05/06 20G is a good buy.
Front mount intercoler ( or an sti8 top mount would probably do )
A mappable ECU Apexi pfc is cheapest and is quality for the money+mapping
A good induction kit ( or make your own )
PFR7B spark plugs.
might need something to control boost, not sure if the map sensor on your model is sufficent. A manual boost controller is the cheapest way.
A knock link ( if you buy the apexi ecu and get the commander with it, you can do away with this )
think thats about it but I may have missed something..
255lph fuel pump
550 injectors
adjustable fuel pressure regulator
ported or tubular exhaust headers+up pipe
decat downpipe
a good make 3" exhaust system
better turbo. A TD05/06 20G is a good buy.
Front mount intercoler ( or an sti8 top mount would probably do )
A mappable ECU Apexi pfc is cheapest and is quality for the money+mapping
A good induction kit ( or make your own
)PFR7B spark plugs.
might need something to control boost, not sure if the map sensor on your model is sufficent. A manual boost controller is the cheapest way.
A knock link ( if you buy the apexi ecu and get the commander with it, you can do away with this )
think thats about it but I may have missed something..
26 October 2005, 02:46 PM
#9
I think the budget needs to be over £4k for a reliable 380 bhp.
The 18G is generally 20bhp behind the 20G like for like.
Not sure there is a lot of spool difference between the two.
Ported headers make a good difference and retain good low down spool but for that power level you have to start considering a GOOD design and quality of tubular headers The downside is that your spool point will move up the rev band 300+ rpm which surprisingly robs some of the pleasant drivability low down.
It depends really on what you want and how important a number is. That said I have had a TD05-20G and O/E ported headers at 407 bhp but that was a very good result.
The 18G is generally 20bhp behind the 20G like for like.
Not sure there is a lot of spool difference between the two.
Ported headers make a good difference and retain good low down spool but for that power level you have to start considering a GOOD design and quality of tubular headers The downside is that your spool point will move up the rev band 300+ rpm which surprisingly robs some of the pleasant drivability low down.
It depends really on what you want and how important a number is. That said I have had a TD05-20G and O/E ported headers at 407 bhp but that was a very good result.
26 October 2005, 05:27 PM
#10
As Harvery states OE Ported headers are fine for 380bhp (they were fine on my car at over 400bhp)
Plus that way you dont have the 'potential' hassle that other owners have had with leaking gaskets on after market headers (you can get problems even with the 3 bolt flanges)
I have an sti5 99 version and at one point had 380bhp
Turbo is the key I think here and whether you want over 380bhp on all rollers and on what fuel? - are you prepared to use bottles of NF Booster or do you want the simplicity of just Optimax or Optimax and a cheaper bottle of Millers - the power differences ARE significant
To achieve 380bhp on my sti5 I had:
VF22 Hybrid Turbo.
3 Inch Downpipe - Hayward and Scott (non-cat)
HKS Hyper mid and rear
(Note any decent 3 inch all through system should be similar)
740cc Injectors
Uprated fuel pump
Uprated fuel pressure regulator
Link ECU - or some other decent ECU
Optimax and Booster
APS airfilter - I had this in the wing
Uprated AP Organic Clutch
Front mounted intercooler
No doubt I've missed something.
If you want real reliability - I'd opt for a bigger Turbo to give you more flexibility at lower boost levels
For much more than 380 bhp on all rollers I'd suspect you'd have to look at going internal as you have to run higher boost to get the power numbers!
(or you can cheat and use Race fuel!) - but this aint practical
Plus that way you dont have the 'potential' hassle that other owners have had with leaking gaskets on after market headers (you can get problems even with the 3 bolt flanges)
I have an sti5 99 version and at one point had 380bhp
Turbo is the key I think here and whether you want over 380bhp on all rollers and on what fuel? - are you prepared to use bottles of NF Booster or do you want the simplicity of just Optimax or Optimax and a cheaper bottle of Millers - the power differences ARE significant
To achieve 380bhp on my sti5 I had:
VF22 Hybrid Turbo.
3 Inch Downpipe - Hayward and Scott (non-cat)
HKS Hyper mid and rear
(Note any decent 3 inch all through system should be similar)
740cc Injectors
Uprated fuel pump
Uprated fuel pressure regulator
Link ECU - or some other decent ECU
Optimax and Booster
APS airfilter - I had this in the wing
Uprated AP Organic Clutch
Front mounted intercooler
No doubt I've missed something.
If you want real reliability - I'd opt for a bigger Turbo to give you more flexibility at lower boost levels
For much more than 380 bhp on all rollers I'd suspect you'd have to look at going internal as you have to run higher boost to get the power numbers!
(or you can cheat and use Race fuel!) - but this aint practical
26 October 2005, 05:39 PM
#11
Harvey makes a good point about the 'boost rpm shift'. That 300 rpm makes quite a different engine on nornal road driving.
Gunning the engine really hard you won't notice it as the engine is always above 4500.
On the fuel front:
I know a Nissan Gtr get a hike of 40 bhp from race fuel only over Optimax.
I run Optimax with a full dose of NF booster. What change in BHP/Torque would result in dropping to Optimax only with a re map from AndyF?
If I get 380 x 340 now, what would it drop to? 360 x 320?
I plan to go sports cat next year at the same tine from the full decat currently, but a latest metal 100 rated cat (maybe Miltek)
Mattyboy, don't let all this put you off. The transformation of the car with full suspension mods is stunning.
Graham.
Gunning the engine really hard you won't notice it as the engine is always above 4500.
On the fuel front:
I know a Nissan Gtr get a hike of 40 bhp from race fuel only over Optimax.
I run Optimax with a full dose of NF booster. What change in BHP/Torque would result in dropping to Optimax only with a re map from AndyF?
If I get 380 x 340 now, what would it drop to? 360 x 320?
I plan to go sports cat next year at the same tine from the full decat currently, but a latest metal 100 rated cat (maybe Miltek)
Mattyboy, don't let all this put you off. The transformation of the car with full suspension mods is stunning.
Graham.
26 October 2005, 05:53 PM
#12
Graham
I did an experiment on fuel with a TD05/20g Turbo at Powerstation over the course of a few days
With Optimax and full bottle of NF I got 383bhp/332lbs
With Race Fuel (cheap stuff £3 a litre 106 Ron/96Mon) I got 419bhp/higher Lbs - cant remember the eact lbs numbers (7 degrees of extra advance I think it was with the race fuel) over the Optimax and NF bottle
On standard Optimax I got only 345bhp............ and just over 300lbs.......
I did an experiment on fuel with a TD05/20g Turbo at Powerstation over the course of a few days
With Optimax and full bottle of NF I got 383bhp/332lbs
With Race Fuel (cheap stuff £3 a litre 106 Ron/96Mon) I got 419bhp/higher Lbs - cant remember the eact lbs numbers (7 degrees of extra advance I think it was with the race fuel) over the Optimax and NF bottle
On standard Optimax I got only 345bhp............ and just over 300lbs.......
26 October 2005, 10:33 PM
#14
The '380 x 340' engine is on Optimax + NF with a full 3'' decat of a very ancient design.
When AndyF mapped it in the first place it had a secondhand 3'' sports cat with (I guess) a 200 grade cat in the downpipe. The rest of the system was off the 3'' decat.
Over 6000 rpm the boost dropped off from about 1.4 to 1.1/1.2 and Andy couldn't get it to hold any better.
We thought the restriction was the cat.
I changed the cat for the decat just before the trip to Well Lane where the engine delivered a best run of 407 x 340 on the same fuel/map.
On the road the car felt the same with the cat as the decat.
I want to clean the engine up for next years' hill climbing as the regulations get tighter still.
Technically, NF is illegal in hill climbs though masses use it (and Millers etc).
Graham.
When AndyF mapped it in the first place it had a secondhand 3'' sports cat with (I guess) a 200 grade cat in the downpipe. The rest of the system was off the 3'' decat.
Over 6000 rpm the boost dropped off from about 1.4 to 1.1/1.2 and Andy couldn't get it to hold any better.
We thought the restriction was the cat.
I changed the cat for the decat just before the trip to Well Lane where the engine delivered a best run of 407 x 340 on the same fuel/map.
On the road the car felt the same with the cat as the decat.
I want to clean the engine up for next years' hill climbing as the regulations get tighter still.
Technically, NF is illegal in hill climbs though masses use it (and Millers etc).
Graham.
26 October 2005, 11:11 PM
#16
Originally Posted by harvey
I think the budget needs to be over £4k for a reliable 380 bhp.
The 18G is generally 20bhp behind the 20G like for like.
Not sure there is a lot of spool difference between the two.
Ported headers make a good difference and retain good low down spool but for that power level you have to start considering a GOOD design and quality of tubular headers The downside is that your spool point will move up the rev band 300+ rpm which surprisingly robs some of the pleasant drivability low down.
It depends really on what you want and how important a number is. That said I have had a TD05-20G and O/E ported headers at 407 bhp but that was a very good result.
The 18G is generally 20bhp behind the 20G like for like.
Not sure there is a lot of spool difference between the two.
Ported headers make a good difference and retain good low down spool but for that power level you have to start considering a GOOD design and quality of tubular headers The downside is that your spool point will move up the rev band 300+ rpm which surprisingly robs some of the pleasant drivability low down.
It depends really on what you want and how important a number is. That said I have had a TD05-20G and O/E ported headers at 407 bhp but that was a very good result.
Still remember picking up a magazine a few years ago and seeing the spec of your car, and thought if I had a Impreza thats how fast I could make it, Until I bought my 1st Scooby and realised how much time and effort it is to get a car running over 400bhp, let alone spending a load more money on brakes, suspension, gearbox etc, and then when things go wrong.
27 October 2005, 11:18 AM
#17
There is a spec for my WRX Wagon here. It runs 380-400+ bhp sbject to map and fuel. (not Race. Too expensive) Also the "old" STi Wagon spec.
www.geocities.com/harveysmith3000
The new 2 litre engine is now in the STi Wagon and after the snagging list is sorted and I get an MOT next week, development, refinement and mapping will continue, hopefully taking us beyond a 600bhp capability from 2 litres and an everyday reliable car.
www.geocities.com/harveysmith3000
The new 2 litre engine is now in the STi Wagon and after the snagging list is sorted and I get an MOT next week, development, refinement and mapping will continue, hopefully taking us beyond a 600bhp capability from 2 litres and an everyday reliable car.
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