Pro Stock John

iTrader: (34)

Some folks have asked me recently for info regarding 1.7 Y/T rockers.

What I'd like to hear about, is has anyone picked up at least 5rwhp from swapping them on? Stock or modified cars.

Please post your experiences.

Ozz

yep you can find some post about my gains here somewhere.

But I went to Raging Motor Sports and Mark stapped my T/A on the dyno and we did 3 runs. Then we swapped to YT 1.7 from stock rockers without unhooking from the dyno. we pulled 3 runs afterwards and had a solid 7hp on each run... no change in weather. I have S3 heads with Manley double springs and a TR224/224 and I was shelling the stock rockers. I have had no problems since and while not perfectly quite it is much better than stock. Mark saw gains along the same lines on other cars he tested.


Ozz

Pro Stock John

iTrader: (34)

Excellent post!

Smoke_ur_5.0

iTrader: (2)

Matt is correct on his dyno and we did two other swaps ON the dyno. One being a customers H/C car that made 422rwhp before the rockers and a steady 430rwhp after. The shop formula was a test mule too. It only picked up about 5rwhp and 5rwtq.

TTtop

iTrader: (6)

Were the gains across the whole rpm range or limited to top-end only, or somewhere else?

Can you post a dynograph, please?

Thanks,

Randy

verbs

I have to dyno once my gears break in, but I'll keep you posted. It'll be at least a few weeks though.

Slowhawk

iTrader: (12)

1hp here..I did dyno on different days though. Same dyno

Phate

iTrader: (2)

John,

Are you using a good set of rockers on your new combo? Probably not such a bad idea if you are going to be spinning the car that high!

Scott

Pro Stock John

iTrader: (34)

I have set of 1.7 Y/T's on my FI motor, so I can spin the motor over 7000 rpms with a hyd.