frank_ster
Member
- Joined
- Feb 16, 2013
howdy yall i'm running the 1987 front wheel drive block in a awd subaru,
got a few questions,
i have a comp roller cam from summit that was intended for a grandnational. i cut the fuelpump lobe and oil pump drive off and shoved it in, its Advertised Duration 264/264, Lift .504/.504
i put in some 140 # valve springs.
issues i have the timming chain doesnt last very long .. about 25 000 miles. i had a comp cams doubble roller and it got streached and broke a bunch of teeth off the cam gear. now i'm running a silent chain but those dont last long either i have about 15000 miles now on this one and i'm getting scared!
the other issue i have is the engine looses a lot of torque over 5000 rpm is this typical of grand nationals with this size of cam?
for turbo i'm running a holset hx 35 i'm thinking is maybe a little on the small side, this engine and that turbo in my pontiac sunbird i ran 117 mph 1/4 mile shifting at 4800 rpm @19 lbs boost.
and why arn't more people running the 87 front wheel drive blocks that have the factory roller like mine?
got a few questions,
i have a comp roller cam from summit that was intended for a grandnational. i cut the fuelpump lobe and oil pump drive off and shoved it in, its Advertised Duration 264/264, Lift .504/.504
i put in some 140 # valve springs.
issues i have the timming chain doesnt last very long .. about 25 000 miles. i had a comp cams doubble roller and it got streached and broke a bunch of teeth off the cam gear. now i'm running a silent chain but those dont last long either i have about 15000 miles now on this one and i'm getting scared!
the other issue i have is the engine looses a lot of torque over 5000 rpm is this typical of grand nationals with this size of cam?
for turbo i'm running a holset hx 35 i'm thinking is maybe a little on the small side, this engine and that turbo in my pontiac sunbird i ran 117 mph 1/4 mile shifting at 4800 rpm @19 lbs boost.
and why arn't more people running the 87 front wheel drive blocks that have the factory roller like mine?