400bhp hawkeye impeza
21 August 2011, 07:11 PM
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400bhp hawkeye impeza
Who is running 400bhp in a 2.5 hawkeye ?????
What mods did you do to do this ,
And are you running a standard bottom end ????
cheers
What mods did you do to do this ,
And are you running a standard bottom end ????
cheers
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21 August 2011, 08:31 PM
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ive had mine mapped to 370 as mapper told me this is round about the limit for the OE hawk pistons.
Although this meant running the 20g at 1.4bar instead of the higher boosts which is possible, i choose to take the mappers advice rather than take a chance and having the engine go pop for the sake of 30-40 extra hp
Others have run theres quite succesfully with higher figures, but do you want to be the unlucky 1 that didnt? Thats my thinking anyways
Although this meant running the 20g at 1.4bar instead of the higher boosts which is possible, i choose to take the mappers advice rather than take a chance and having the engine go pop for the sake of 30-40 extra hp
Others have run theres quite succesfully with higher figures, but do you want to be the unlucky 1 that didnt? Thats my thinking anyways
21 August 2011, 11:45 PM
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i do agree, well maybe 1.4 bar :P but as said that should be as far as your really looking, Bob Rawle advised me 360-370 was all the OEM pistons on hawk sti reliabily handle , i certainly wasnt going to go against his advice and the car feels like a monster.
Having said that iam sure i will have tamed the beast in a couple of months and require more power
Having said that iam sure i will have tamed the beast in a couple of months and require more power
22 August 2011, 12:36 AM
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Yeah i think 400 is max.I have a STI with a 20g turbo, hks exhaust downpipe,550 injectors,bigger tmic,ecutek mapping,turbo timer running at 1.3 bar
But i have a problem and was wondering if any one can help,
when i get close to 5.500 rpm im loosing boost and also in first gear it goes to 1 bar boost and 2nd gear its 1.2 bar then 3rd,4th,5th and 6th its 1.3 bar,would anyone know the cause of this
But i have a problem and was wondering if any one can help,
when i get close to 5.500 rpm im loosing boost and also in first gear it goes to 1 bar boost and 2nd gear its 1.2 bar then 3rd,4th,5th and 6th its 1.3 bar,would anyone know the cause of this
22 August 2011, 11:55 AM
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i do agree, well maybe 1.4 bar :P but as said that should be as far as your really looking, Bob Rawle advised me 360-370 was all the OEM pistons on hawk sti reliabily handle , i certainly wasnt going to go against his advice and the car feels like a monster.
Having said that iam sure i will have tamed the beast in a couple of months and require more power
Having said that iam sure i will have tamed the beast in a couple of months and require more power
Hawk pistons just aren't strong (ask Ian Litchfield when he was developing the Type 25) or David at APi who re-builds more engines than most, or most a mappers, who will say that 1.3 ish is about as high as they're comfortable going. Not that you need to put alot of boost through the 2.5 to get it to perform well. Before I had the forged conversion on my car, 1.3 was all it too to get it to 350/380 on the std VF43. Even now (with forged in internals) it makes 470/480 at 1.7 bar with the SC46 which isn't exactly monster boost!
My old UK 99 took 1.5 bar peak on the std cast items and didn't miss a beat.... that's progress for ya!
23 August 2011, 02:06 PM
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Well I've just got back from mapping with Bob Rawle and on the original turbo, vf43 (but set up by Big D), and standard engine he said it's now 390+bhp, but I am running a hyperflow front mount and full miltek exhaust with headers well chuffed, oh and running a steady 1.3/1.4 bar boost oh the car is a '57 plate sti type uk hawk.
well chuffed, oh and running a steady 1.3/1.4 bar boost oh the car is a '57 plate sti type uk hawk.
Last edited by Pez; 23 August 2011 at 02:35 PM.
23 August 2011, 03:25 PM
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Well I've just got back from mapping with Bob Rawle and on the original turbo, vf43 (but set up by Big D), and standard engine he said it's now 390+bhp, but I am running a hyperflow front mount and full miltek exhaust with headers well chuffed, oh and running a steady 1.3/1.4 bar boost oh the car is a '57 plate sti type uk hawk.
well chuffed, oh and running a steady 1.3/1.4 bar boost oh the car is a '57 plate sti type uk hawk.
Just shows you what a good exhaust system and FMIC can do over the PPP equipment! Nest you'll be wanting something in the 400s though and then it starts to get expensive!
23 August 2011, 03:48 PM
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Well I've just got back from mapping with Bob Rawle and on the original turbo, vf43 (but set up by Big D), and standard engine he said it's now 390+bhp, but I am running a hyperflow front mount and full miltek exhaust with headers well chuffed, oh and running a steady 1.3/1.4 bar boost oh the car is a '57 plate sti type uk hawk.
well chuffed, oh and running a steady 1.3/1.4 bar boost oh the car is a '57 plate sti type uk hawk.
23 August 2011, 08:20 PM
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Thanks chaps. I'm bloody well happy with it. But I'm never content, i know that I'm reaching the max limits of the car so next step will be a proper engine build and new turbo and I'm aiming for the 500 mark but that's long term over the next year or two. But for now what a great result. Just goes to prove what is actually capable with a good set up and a bit of tweaking of the original turbo. Can't wait for the power run tomorrow now to see exactly what it is putting out :-)
24 August 2011, 07:02 AM
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31 August 2011, 10:09 AM
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Everyone keeps telling me that it's pretty impressive, that power on such low boost... Dare i even say i could be the only 2.5 like it anywhere in the UK?? As I've not heard of any other one running that power still on the original vf43 on that boost??
I've had a few who's doubted it and even told me I'm lying and that it's not possible but quite clearly it is as it's done it! Lol
I've had a few who's doubted it and even told me I'm lying and that it's not possible but quite clearly it is as it's done it! Lol
31 August 2011, 11:32 AM
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Everyone keeps telling me that it's pretty impressive, that power on such low boost... Dare i even say i could be the only 2.5 like it anywhere in the UK?? As I've not heard of any other one running that power still on the original vf43 on that boost??
I've had a few who's doubted it and even told me I'm lying and that it's not possible but quite clearly it is as it's done it! Lol
I've had a few who's doubted it and even told me I'm lying and that it's not possible but quite clearly it is as it's done it! Lol
Although I must admit a tinge of the green-eyed monster. Lol
31 August 2011, 12:53 PM
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I'd be happy with your sort of power tho, what set-up are you currently running??
31 August 2011, 01:54 PM
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HKS 3" down pipe
HKS 3" Silent Hi Power back box
Haywood & Scott centre section
Prodrive 3 port boost Solonoid
Walbro 255Lph fuel pump
Mahale pistons with uprated head studs
Custom Open S remap by FB tunning
uprated spark pluggs. 1 degree colder i think.
Performance friction pads alround.
That it i think
