What to expect?
10-04-2006, 05:01 PM
#1
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Join Date: Aug 2006
Location: Kansas
Posts: 3,706
What to expect?
355 LT1 with
edelbrock heads
cc306 cam
lingenfelter CAI
true duals (magnaflow mufflers)
pacesetter LT's
trans-go shift kit
summit racing 58mm throttle body
morel lifters
thunder racing pushrods
crane gold 1.6 rocker arms
AFR Hydra-rev spring kit
federal mogul engine bearings
eagle h-beam connecting rods
eagle crank
diamond pistons
3.73 gears
3000 stall
I have chosen the edelbrock heads because it will put me at the compression that i want n everything so please do not recommend otherwise.
What numbers (dyno) or quarter mile times do u think i should be able to hit?
I'm kind of hoping for like 420RWHP or an 11.7 1/4 mile...but im not sure how realistic that is.
edelbrock heads
cc306 cam
lingenfelter CAI
true duals (magnaflow mufflers)
pacesetter LT's
trans-go shift kit
summit racing 58mm throttle body
morel lifters
thunder racing pushrods
crane gold 1.6 rocker arms
AFR Hydra-rev spring kit
federal mogul engine bearings
eagle h-beam connecting rods
eagle crank
diamond pistons
3.73 gears
3000 stall
I have chosen the edelbrock heads because it will put me at the compression that i want n everything so please do not recommend otherwise.
What numbers (dyno) or quarter mile times do u think i should be able to hit?
I'm kind of hoping for like 420RWHP or an 11.7 1/4 mile...but im not sure how realistic that is.
10-04-2006, 09:34 PM
#3
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Join Date: Jan 2004
Location: Littlestown, PA
Posts: 1,903
Re: What to expect?
Its really hard to predict ET and MPH...I don't know how the Edelbrock heads are ported, valve size, flow, chamber size, etc...I thought the LS1 versions were ported by LPE, but I don't know about the LT1s ( or is it the other way around?)...There are guys using the 306 with great results...Its all in the combo, tuning, suspension set up, tires, etc...and attention to details...I do think a 3000 stall is too low...I would look at a 3600 or maybe higher depending upon what rpm the motor makes its peak torque at...PI recommends 700-900 rpm below the torque peak for a good street/strip combo...I like the 3.73s for an A4, though...
I would think you should see at least 115 mph which is good enough for high 11s with the appropriate suspension and tires...420rwhp is a hard number to hit with an A4 and, really, the numbers don't mean much to me as I've had my run ins with different dynos making all kinds of crazy numbers...If your tune is right the track will be your "dyno"...I trapped 119.5 mph a few weeks ago in bad air with my 362 er 381 eh 400 rwhp car...We also need the weight of your car, too...Good luck with it...
--Alan
I would think you should see at least 115 mph which is good enough for high 11s with the appropriate suspension and tires...420rwhp is a hard number to hit with an A4 and, really, the numbers don't mean much to me as I've had my run ins with different dynos making all kinds of crazy numbers...If your tune is right the track will be your "dyno"...I trapped 119.5 mph a few weeks ago in bad air with my 362 er 381 eh 400 rwhp car...We also need the weight of your car, too...Good luck with it...
--Alan
10-04-2006, 09:47 PM
#4
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Join Date: Feb 2004
Posts: 4,800
Re: What to expect?
You know you made at least one bad choice and specifically requested not to be told so, that is why no replies.
Your dyno and track goals are a pipe dream you will only hit if you either start over on the list or spray as well.
Your dyno and track goals are a pipe dream you will only hit if you either start over on the list or spray as well.
10-05-2006, 10:38 AM
#5
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Join Date: Apr 2004
Location: Fresno, Ca
Posts: 386
Re: What to expect?
I'd honestly guess 365rwhp and a possible high 11's depending on your 60' of course. Its an auto so its gonna eat hp on the dyno. And i totally agree that a 3600 would be a great converter for this setup. 3000 is too small for that cam...
10-05-2006, 10:42 AM
#6
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Join Date: Jan 2004
Location: Littlestown, PA
Posts: 1,903
Re: What to expect?
My biggest concern would be the heads because I know nothing about them...Most will tell you that properly ported stockers work great...Mine are LT1s with 2.00/1.56 valves originally CNC/hand ported in 1995 by LPE and re-ported in 2005 by E.B. Porting...But you have already made up your mind...I just don't know how good they are because I haven't heard of many using them...
--Alan
--Alan
10-05-2006, 11:14 AM
#8
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Join Date: Nov 2002
Location: Jacksonville
Posts: 4,784
Re: What to expect?
The performer heads aren't impressive by any standard. Well, maybe if you count the fact that they're selling you a set of heads that perform on par with stockers. That's pretty impressive marketing. 
http://store.summitracing.com/partde...5&autoview=sku
54cc as cast chambers
"Increased valve size for maximum performance" 1.94"/1.55"
"The intake and exhaust runners are CNC-machine profiled for superior flow and performance. "
http://store.summitracing.com/partde...5&autoview=sku
54cc as cast chambers
"Increased valve size for maximum performance" 1.94"/1.55"
"The intake and exhaust runners are CNC-machine profiled for superior flow and performance. "
10-05-2006, 03:18 PM
#9
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Join Date: Aug 2006
Location: Kansas
Posts: 3,706
Re: What to expect?
yeah, i know that the valves are pretty much like the stock ones. but the smaller chamber would boost up my compression. I have a friend using edelbrock heads on an LS1 and he is just under 600RWHP, so I believe they are pretty decent. I know its either the LS1 or LT1 heads (or both), that are ported n stuff my lingenfelter. Why does everybody hate the edelbrock heads so much? Using the heads will put me at approx 11.7:1 static compression, with a 8.1:1 dynamic compression so that i can use pump gas still.
10-05-2006, 05:17 PM
#10
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Join Date: Jan 2004
Location: Littlestown, PA
Posts: 1,903
Re: What to expect?
The compression ratio only gives a part of the story...If you don't flow well then you've gained nothing...I believe its only the LS1s that are ported by LPE...I run the stock chamber size and run 11.2:1 with the proper head gasket thickness...Like others have said, its all in the heads...If you haven't purchased the heads yet you may want to do a little more research and see what the fast guys are running and go from there...Most will tell you that LT1 castings can be made to work very well with t right work done to them...I trapped 119.5 in bad air with mine with a cam thats smaller than the 306...
--Alan
--Alan
10-05-2006, 05:26 PM
#11
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Location: Hell was full so they sent me to NJ
Posts: 70,825
Re: What to expect?
Are your Edelbrock heads ported, or just the way they came out of the box? Edelbrock claims an increase of 24 HP "out of the box".
How did you determine that the Edelbrock's 54mm combustion chambers would give you 11.7:1 static CR? Why would the stock heads, which are also 54cc not give you the same CR?
Performer LT1 Head
Designed for the 1992-97 LT1 engines, these aluminum heads have specially designed 170cc intake and 60cc exhaust ports with increased valve sizes (1.94" intake, 1.55" exhaust) for maximum flow and performance. Combustion chamber volume is 54cc. Edelbrock Performer LT1 heads made 24 horsepower more than factory-stock LT1 heads and raised the peak power level by 500 rpm. Performer LT1 heads work with stock or aftermarket self-guiding roller rocker arms.
Designed for the 1992-97 LT1 engines, these aluminum heads have specially designed 170cc intake and 60cc exhaust ports with increased valve sizes (1.94" intake, 1.55" exhaust) for maximum flow and performance. Combustion chamber volume is 54cc. Edelbrock Performer LT1 heads made 24 horsepower more than factory-stock LT1 heads and raised the peak power level by 500 rpm. Performer LT1 heads work with stock or aftermarket self-guiding roller rocker arms.
10-05-2006, 06:55 PM
#12
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Join Date: Jan 2006
Location: Shillington PA
Posts: 778
Re: What to expect?
Originally Posted by 96capricemgr
You know you made at least one bad choice and specifically requested not to be told so, that is why no replies.
Your dyno and track goals are a pipe dream you will only hit if you either start over on the list or spray as well.
Your dyno and track goals are a pipe dream you will only hit if you either start over on the list or spray as well.
10-05-2006, 08:12 PM
#13
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Location: Kansas
Posts: 3,706
Re: What to expect?
What heads would you guys recommend? I am on a tight budget being a high-school student and all. The only thing that would be in my pricerange would be ported stock heads, or some used-trickflows or something (which i will pickup if i can find some). And i thought the stock chamber size was 58CC?
I talked to my mechanic today and he said that even edelbrocks would be better than ported stockers, and for about the same price.
I talked to my mechanic today and he said that even edelbrocks would be better than ported stockers, and for about the same price.
10-05-2006, 08:21 PM
#14
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Join Date: Jan 2004
Location: Littlestown, PA
Posts: 1,903
Re: What to expect?
Do you have the stockers? If you do I would strongly suggest having a competent porter port them, add 2.00/1.56 valves, springs to match your cam selection, etc...Lloyd Elliot is big on here for packages of heads/matched cam and is reasonable...I chose a local guy and have been extremely happy...Ask around on here and see what works and what doesn't...Everyone has their favorite porter, but most will agree that ported stockers work very well in most cases and should be cheaper than getting the Edelbrocks...
And I'm not so sure about the mechanic you're using if he thinks the Edelbrocks will work better than ported stockers...
--Alan
And I'm not so sure about the mechanic you're using if he thinks the Edelbrocks will work better than ported stockers...
--Alan
10-05-2006, 08:29 PM
#15
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Join Date: Aug 2006
Location: Kansas
Posts: 3,706
Re: What to expect?
idk, he has a LS1 pushing just under 600RWHP as a daily driver...with edelbrock heads. But then again, LS1 vs. LT1....We also have a friend with a built 355 LT1 similar to what im looking at with ported stockers running 12 flats...and i want faster than that. Lloyd elliots LE2 heads are like 1700...out of my price range. I have about a grand for heads, and then the valve springs n everything