engine mods advice
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engine mods advice
hey folks... have just had cosworth headgaskets put on my scoob... when the mechanic tightened up the rocker cover bolts hes rounded off 2 threads so gotta have the engine out again to hellacoil it.. nowim thinking i mightaswell stick someother bits on while its out to make it worthwhile. ive got a v2 555 sti and its cdb. has anyone got any ideas how i could make some decent power/strength upgrades and for what prices as im not that clued up on the engine. cheers
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well as the heads have been tourqed down now your abit late to do any internal stuff as pulling them off would mean throwing away cosi head gaskets but as its out you could change the turbo or manifold for stainless tubalur type which with aremap would c some decent power increase.
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well as the heads have been tourqed down now your abit late to do any internal stuff as pulling them off would mean throwing away cosi head gaskets but as its out you could change the turbo or manifold for stainless tubalur type which with aremap would c some decent power increase.
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why do you say ihi ovr the 20g's anyway? is that just your opinion cos ive herd nothing but good bout the 20g's.. if i cud get to 400bhp id be happy for now
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well i had a vf23 ihi on my v3 and they are good turbos... what ihi wud be good for 400bhp then do u think? and if its cheaper than the 20g then i might just go for it.
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is this what you mean with the manifold? whats the difference between the 34/35 aswell?
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that manifold is good for tourqe but the dpwn sides are that u need to modifie the lower front panel and you loose the scooby rumble,34 is single scroll and 35 is twin scroll more expensive though,id go with 34 and unequal length as the tourqe gain is only marginal and the rumble is part of the scooby appeal
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that manifold is good for tourqe but the dpwn sides are that u need to modifie the lower front panel and you loose the scooby rumble,34 is single scroll and 35 is twin scroll more expensive though,id go with 34 and unequal length as the tourqe gain is only marginal and the rumble is part of the scooby appeal
if any1 else have any other opinions id be happy to hear them..
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You've got your terminology wrong - the 34 is roller bearing; the 35 a regular thrust, or sleeve, bearing. But effectively similar performing, with the 34 having a tad more top end; the 34 being a tad more lively.
Both have conventional single scroll exhaust feeds.
Also, it's accepted that the TD series of turbos, are mechanically more robust than the IHI units, given a like-for-like age.
Both have conventional single scroll exhaust feeds.
Also, it's accepted that the TD series of turbos, are mechanically more robust than the IHI units, given a like-for-like age.
Last edited by joz8968; 03 July 2010 at 09:40 PM.
#15
sorry for hijackin ur thread mate but i have got a v5 sti - its got a ihi vf28 as standard , harveys gt front mount, k & n, a full decat and a simtek ecu and i am pumping out 336 bhp, would a vf35 make a big difference?
also these big turbos whts the spool time like compared to my vf28 and why does it get rid of the burble!
also these big turbos whts the spool time like compared to my vf28 and why does it get rid of the burble!
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sorry for hijackin ur thread mate but i have got a v5 sti - its got a ihi vf28 as standard , harveys gt front mount, k & n, a full decat and a simtek ecu and i am pumping out 336 bhp, would a vf35 make a big difference?
also these big turbos whts the spool time like compared to my vf28 and why does it get rid of the burble!
also these big turbos whts the spool time like compared to my vf28 and why does it get rid of the burble!
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I'd stick with the TD05 16G and max it out with ESL board and live remap. Will save the hassle of getting a top entry housing for a VF for very limited power increases.
#20
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Re. OEM-fit turbos, it's only the much later newer New Age STi-fitment VF range that have twin scroll options - if memory serves (which it wont! lol): VF37 (or is it 39?) and VF43 (or is it 48 or 49?). I told you my memory wouldn't serve!
* Also, as dynamix says, VF34 in the c.340-370bhp area; VF35 in the c.330-360 area... But defo NOT 400!
Last edited by joz8968; 04 July 2010 at 10:17 AM.
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Everything below the VF36, ie the 35, 34, 30, 29, 28, 24, 23 etc are all single scroll units, the vf36 was the frist twin scroll unit and it wont fit on a single scroll car without alot of work.
OP, 400bhp is possible on your engine, it wont last long (could be 1 mile or 100) then you will be looking ofr a new block as well as the old one will have a nice hole in the side of it where the piston ejected itself out the side, if you want 400bhp then its a fair bit of cash, especially ifyour after reliability throughout the car, your talking full engine rebuild with all the parts, circa 3500 quid, fmic, brakes, clutch, gearbox (that wont last long) so 6 speed is a worthwhile investment, those are 2.5k with the rear diff, or a ppg box (not as strong but 5 speed) for 5k new, 2.5k 2nd hand, possibly replacing the tired suspension, add another 1k, some ancillaries, add labour, so your looking at around the 10k mark.
Your other option is keep the TD05 (which is a good turbo, capable of 350bhp) which is about as far as you want to take it on the standard internals if you want reliability, personally 330bhp would suffice most of the time, but if you want the 400 go for it, if you dont pay the costs of the above though, your car will be either in the scrap yard or off the road for a long time
Tony
OP, 400bhp is possible on your engine, it wont last long (could be 1 mile or 100) then you will be looking ofr a new block as well as the old one will have a nice hole in the side of it where the piston ejected itself out the side, if you want 400bhp then its a fair bit of cash, especially ifyour after reliability throughout the car, your talking full engine rebuild with all the parts, circa 3500 quid, fmic, brakes, clutch, gearbox (that wont last long) so 6 speed is a worthwhile investment, those are 2.5k with the rear diff, or a ppg box (not as strong but 5 speed) for 5k new, 2.5k 2nd hand, possibly replacing the tired suspension, add another 1k, some ancillaries, add labour, so your looking at around the 10k mark.
Your other option is keep the TD05 (which is a good turbo, capable of 350bhp) which is about as far as you want to take it on the standard internals if you want reliability, personally 330bhp would suffice most of the time, but if you want the 400 go for it, if you dont pay the costs of the above though, your car will be either in the scrap yard or off the road for a long time
Tony
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