cam retarding Need new tune?
cam retarding Need new tune? IVe got a 382 speed inc stroker, stage 2 patriots, typhoon intake, 4l60e with 3500 verter. all boltons.
has a comp 240/248 609/615 112+4 cam. it was tuned with this cam installed dot to dot. at the dyno the car flatlined at 5300 and carried it to 6300 before droping like bricks. I wanted it to spin much higher so I retarded my cam 6 degrees. basically -2 degrees since it has 4 degrees ground in. this brought my dcr from 9.37- 8.77. static is 11.5. Pump gas motor. anyhow I knew it was going to lose bottom end but it doesnt seem like its picked up any top end. Is this a result of the tune or the cam not working well up top? Just dont want to spend all the cash to get back on the dyno if there is a problem.
TIA
Mike
has a comp 240/248 609/615 112+4 cam. it was tuned with this cam installed dot to dot. at the dyno the car flatlined at 5300 and carried it to 6300 before droping like bricks. I wanted it to spin much higher so I retarded my cam 6 degrees. basically -2 degrees since it has 4 degrees ground in. this brought my dcr from 9.37- 8.77. static is 11.5. Pump gas motor. anyhow I knew it was going to lose bottom end but it doesnt seem like its picked up any top end. Is this a result of the tune or the cam not working well up top? Just dont want to spend all the cash to get back on the dyno if there is a problem.
TIA
Mike
Originally Posted by 1BAD02WS6
IVe got a 382 speed inc stroker, stage 2 patriots, typhoon intake, 4l60e with 3500 verter. all boltons.
has a comp 240/248 609/615 112+4 cam. it was tuned with this cam installed dot to dot. at the dyno the car flatlined at 5300 and carried it to 6300 before droping like bricks. I wanted it to spin much higher so I retarded my cam 6 degrees. basically -2 degrees since it has 4 degrees ground in. this brought my dcr from 9.37- 8.77. static is 11.5. Pump gas motor. anyhow I knew it was going to lose bottom end but it doesnt seem like its picked up any top end. Is this a result of the tune or the cam not working well up top? Just dont want to spend all the cash to get back on the dyno if there is a problem.
TIA
Mike
has a comp 240/248 609/615 112+4 cam. it was tuned with this cam installed dot to dot. at the dyno the car flatlined at 5300 and carried it to 6300 before droping like bricks. I wanted it to spin much higher so I retarded my cam 6 degrees. basically -2 degrees since it has 4 degrees ground in. this brought my dcr from 9.37- 8.77. static is 11.5. Pump gas motor. anyhow I knew it was going to lose bottom end but it doesnt seem like its picked up any top end. Is this a result of the tune or the cam not working well up top? Just dont want to spend all the cash to get back on the dyno if there is a problem.
TIA
Mike
thats not the question. i changed it from dot to dot(4degrees advanced) to basically -2 degrees. used the -6 slot on my rollmaster chain. I was wondering since it was tuned for it falling off up top would it act the same after degreeing it.
car thumps alot more crisper and revs a ton cleaner. just pulling just like it did before up top.
car thumps alot more crisper and revs a ton cleaner. just pulling just like it did before up top.
On The Tree
Joined: May 2005
Posts: 140
Likes: 0
A 240 degree intake duration w/ 108 icl should not flat line or peak at 5300 rpm, more like 6300+ rpm. You have some other problem or restiction outside the cam, valve events or tune w/ your set up. Futher confirmed by you retarding the intake lobe 6 degrees and not gaining top end hp.
Originally Posted by 1BAD02WS6
thats not the question. i changed it from dot to dot(4degrees advanced) to basically -2 degrees. used the -6 slot on my rollmaster chain. I was wondering since it was tuned for it falling off up top would it act the same after degreeing it.
car thumps alot more crisper and revs a ton cleaner. just pulling just like it did before up top.
car thumps alot more crisper and revs a ton cleaner. just pulling just like it did before up top.
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