Author Topic: Low power, any ideas greatly received  (Read 2501 times)

DeanGT5

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Low power, any ideas greatly received
« on: 20:06, Sat 10 March 2012 »
Took my car to Scoffs today (Many thanks for the time and tea) to see what power it's producing and if anything could be improved. All seems good engine and fueling wise (apart from a bit of a smokey turbo) but the power was way down

The only thing Scoff thought it might be was a faulty AEI unit, didnt have one to try at the time so after checking everything else left it at that. Came back home and swapped the AEI for another, maybe picked up a little quicker but there wasnt a massive difference Probably need a bit more time testing). apart from trying another turbo im at a loss

engine
msm head
jetted carb, choke removed
double cap intercooler
piper 285, vernier
low comp pistons
T28 AR42 - .47
running 16.9psi at carb top 118bhp  :oops:
running 20psi carb base 151bhp  :oops:

fishead

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Re: Low power, any ideas greatly received
« Reply #1 on: 09:04, Sun 11 March 2012 »
compression is ?
ign timing is ?
cam timed to ?

DeanGT5

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Re: Low power, any ideas greatly received
« Reply #2 on: 09:11, Sun 11 March 2012 »
Engine has only done 900 miles since rebuild, ignition is standard not sure about cam

fishead

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Re: Low power, any ideas greatly received
« Reply #3 on: 10:16, Sun 11 March 2012 »
means nothing, 'rebuild' means different things to different people

whats the compressions ?

DeanGT5

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Re: Low power, any ideas greatly received
« Reply #4 on: 10:53, Sun 11 March 2012 »
I havent got anything to check the compression but will get it done.

The rebuild consisted of
new crank, bearings etc
new pistons and rings
head skimmed

Its pointing to either the turbo or AEI as ive had three engines producing around the same power, the engine before the rebuild was dynoed at 197bhp at 16psi so its got to be something "On" the car

bluntyr5gtt

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Re: Low power, any ideas greatly received
« Reply #5 on: 12:30, Sun 11 March 2012 »
defo check that compression first, and if you want your turbo looking at give me a shout can sort you a great deal :)

T28/t2.63 (cossie comp housing,t28 comp wheel,t28 shaft/turbine)@23psi
ported head
cat cams 285 cam,springs and vernier
bjr downpipe/elbow
turbo back 2.5" bore longlife system
tubular manifold
fully rejetted carb
Ramair Induction Kit
cosworth 2wd Intercooler
Lowered 50mm
 

Brigsy

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Re: Low power, any ideas greatly received
« Reply #6 on: 11:53, Fri 16 March 2012 »
Definitely check the compression and cam timing

DeanGT5

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Re: Low power, any ideas greatly received
« Reply #7 on: 13:41, Fri 16 March 2012 »
Will do the comp this weekend, what sort of numbers should I be looking for. Also do I need a piper cam wheel gauge to measure the cam?