performance questions hp tq #
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Pro
Joined: Jul 2008
Posts: 699
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From: Wichita Falls Tx
performance questions hp tq #
I've been acummulating parts and want to hear from others .What kind of power gains can i realisticaly see from these parts .So far i've got the long tubes ,hi flow cats ,cat back exaust & crane 1.6's roller rockers .I'm waiting to get the tune . Then in stall everything at once.I'm not trying to make a monster out of this [Working on a 68 550 hp camaro also ,Priorities,just wondering what folks running these bolt ons are getting.Cam and heads are down the line [year or so] Ineed to finish the money pit first!
Drifting
Joined: Dec 2007
Posts: 1,329
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From: woodbury new jersey
l98 or lt1? on the lt1s people usually see 15-25hp for long tubes. not much of an upgrade for the catback, stock system flows well. and i see 10-15hp for the 1.6 rr's. so expect anywhere from 30-45 hp increase. not bad for the $
Pro
Joined: May 2008
Posts: 670
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Last year I did the LT's, 1.6 RR's, no cats on my 93 LT1 very nice improvement in power, you will really enjoy the new hp. If you have a lot of miles on your motor you might want to replace the valve springs with new ones that can stand more lift.
Le Mans Master
Joined: Mar 2001
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
At the rear wheels? 15, maybe 20 hp.
I didn't dyno mine before or after, but the butt dyno said it wasn't a whole lot.
The traqmate data acquisition said improvement from 120mph to 130mph on the Road Atl back straight.
I didn't dyno mine before or after, but the butt dyno said it wasn't a whole lot.
The traqmate data acquisition said improvement from 120mph to 130mph on the Road Atl back straight.
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
If you have a lot of miles on your motor you might want to replace the valve springs with new ones that can stand more lift.
When I put ProMagnum 1.6s into my '88 (98k miles) I also went to CC #981 springs as the OEM springs were very weak out of the box, IMO.
.2 seconds in the 1/4 mile.
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No way I would do 1.6 rockers on stock springs. Upgrade to LT4 springs at a minimum. Those mods won't hurt anything but you really need a cam to wake it up. Been there and have the dyno graphs to prove it. 20 at the wheels max.
