Something is definitely up unless the DA was horrendous. What's the full setup?

 

joelster was there the same day and he said the da was probably around '1100
Motor is stock internally, 90k miles. shorty headers and 3" pipe back to an edlebrock exhaust.)I'll be adding a cutout this winter) 4l60e tranny with stock 3.23 gears. its a street car and has no weight reduction modifications.

 

i had other runs where i trapped 104 and 105 but et's were lower


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In doing so you will add more power....

 

More power!!!!

that being said back in 98 I was running stock engine with SLP shorty headers, STOCK tune with some sensor tweaks, stock converter and trans with 3.43s in the diff and all through a stock I pipe with a flowmaster

Bolted on a ProCharger and it was going 12.6s at 114 all day long winning races. this is before we had tuning tools and the traction deviced we have designed along the way

Did I mention a bone stock tune

we were only going high 1.8 60s then

 

yeah i know the car can run faster, so i dont wanna throw parts at it to "add power" when something isnt adding up with the current set up


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If the valvesprings are original I would suspect them.
The suggestion of some high octane to reduce the likelyhood of detonation is prefectly reasonable too but I think I would rather see you buy a datalogging tool the full logging and tuning package from Tunercat is $255 even if you have a pro email you tunes this would let you make small tweaks and log data for him to make large changes off of.

The 3.23s are keeping you way below peak power in 3rd so you only use the top of the HP curve in first and second.

 

Yeah, there could be a bunch of factors killing your trap speeds. A stock lower end is fine to support a low boost motor, other than the higher compression ratio of 10.4 to 1. That is a receipe for detonation on a stock tune but as 96Caprice said, stock intake, heads and valvetrain coupled with shorty headers is killing the breathing of the motor. Pulling more air doesn't build horsepower. More air in, more fuel and a clear path for exhaust to escape builds horsepower which= MPH in the traps.

The blower with, better valvesprings to control valve float, 1.6 rollerrockers means getting the air and fuel in and out of the combustion chambers with a stock cam a little better, a good tune to provide proper timing and AFR. Higher octane to slow down the detonation created by the extra heat and LT headers will get the motor to breath better and make use of the extra air. These things will give you better trap speeds. Anything else will be a bandaid if you don't want to tear to deep into the motor.

 

okay thanks alot. i was aplanning a valvespring roller rocket swap this winter followed by a dyno tune in the spring


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I'm with caprice on the stock gearing. Ran the numbers through f-body.org, 1/8 mph is decent at 85 mph in 2nd @ 5900, drops to 3600 in 3rd up to 4300 @ 101 through traps. Thats way below power peak. Weak valve springs are worse on a boosted engine as the boost pressure is trying to blow the valve open also.

 

If just doing 1.6 and springs on a stock cam a $35 set of LT4 springs will do the trick. You still have time to try those this fall even if you don't want to drop the coin on good rockers today. Yeah it is your time to install but hell this is your hobby right?

 

#1 obvious thing sticking out is you need a tune
#2 your shorties are choking that motor.
#3 your valvesprings should be upgraded, at a minimum to $35 lt4 springs.

Just a little kick here, camaroracing12 on here is boltons with stock 3.23s runs 12.3 at 108, and with an m6 and boltons i trapped 111. You ate WAY down on power

 

FYI. Our dyno testing of SLP Shorty header Vs Hooker LTs only showed 8-10RWHP differance and not "killing" much of anything.

Wifes car is running in the 11s N/A with those same SLP Shorty headers and it does not drag on any thing

So we compromised 8-10RWHP for a much more usable car that still runns 11s and getts over 22 MPG. Works for me!

 

I would at least find a 3.42 or 3.73 for the car if you street drive a lot. Then a quality valve train. Gain reliability and power.

 

The SLP b-body shorties always worked very well, some of the quickest bolton cars used them. Believe they were 1 3/4 as compared to most other options being 1 5/8 which might have helped them breath despite the short primaries..

 

im lookin for a used 12 bolt with 3. 73


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I just sold a 3 channel 12 bolt moser with 33's and a posi for next to nothing last week. I hate selling race parts since everyone wants to lowball even for quality stuff.

 

^^^^ $10

 

lose weight.
add power.
other than that aerodynamics and DA come into play.

 

Yup 1 3/4 and we have put a loy of power through them over the years. Her car has a Pro Line kit on it and clears every thing. Some thing you will not be doing with LTs for sure