yep, have a 3.1 with 3400 top end. already have the pushrods and shit for the hybrid. so im wondering if i do get the cam during the rebuild do i have to change pushrods, again
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hybrid with crane 260 or 272
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if you use the 260 it should be fine.. the 272 would be close but i bet it would run ok.
what length did you use?
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i'd get the 272 , but you will need longer pushrods. you will make much more use of the better breathing top end.Andy
sigpic
fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.
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dave, it ended up being the size you told me. i cant remember, ill look it up if you dont remember. and why do you need longer pushrods? i mean i dont get that part. itll be a wile befor i put it together im just trying to get everything ready and searched up now. scott said he has a chip for the 272, so that would be good. everythings gettin ported so i would like to do it right the 1st time. not have to do it again for the cam you know.
thanx guys!sigpic
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It would be nice if someone with a H272 and a H260 would post up the base circle measurements...
any cammed setup will need to be tuned, i wouldn't buy a generic chip and just hope for the best.
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these measurements for pushrods are from Syn who had a 3.1/3400 hybrid with the 272.
exhaust
6.342
6.344
6.363
6.334
6.343
INtake-they were all the same basically off by a few thousands
6.002
6.004Andy
sigpic
fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.
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Just an FYI. I now have nearly 500 miles on my GenII with Crane H272 and stock length pushrods, and I am having no problems. I have the Comp Cams 1.52:1 roller rockers, LS6 valve springs, and GM stock rocker arm studs, and everything is working fine. I did have issues when trying to use ARP rocker arm studs, since they are a little shorter than stock. When we turned the engine over by hand, we were getting full coil bind, and pistons were just touching valves. Thanks again Ben for diagnosing this remotely. Hope this helps.Joe Morgan
bracketracer
'93 Sunbird SE 3.1/5-speed 14.869 @ 90.96 Heavily Modded
'00 Grand Prix GTP Sedan 13.689 @ 100.97 Lightly Modded
'09 G8 GXP Manual Trans 13.166 @ 106.47 BONE STOCK
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I ordered my Crane H260. But it'll be a while before my engine is done.'98 Volvo V90 - Ford 5.0 swap in progress
'96 LR Range Rover 4.6 HSE - suspiciously reliable
'92 Volvo 740 Wagon - former parts car, now daily-driver beater
'71 Opel Kadett Wagon - 1.9L CIH w/ Weber DGV 32/36, in bits
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iirc Collin ran his famous 13.99 run with a Comp 260 small port 3100 heads, large port top end and headers.
http://www.v6z24.com/registry/v6h.o.
the Crane H260 is a god all around cam. the Comp 260 is ok too but IMO the crane is better...
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Originally posted by 1meanz View Postthanx for the info man, does it lope at all? i would hope so. anyone with a 260?Joe Morgan
bracketracer
'93 Sunbird SE 3.1/5-speed 14.869 @ 90.96 Heavily Modded
'00 Grand Prix GTP Sedan 13.689 @ 100.97 Lightly Modded
'09 G8 GXP Manual Trans 13.166 @ 106.47 BONE STOCK
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