Heads/Cam combo ?
Heads/Cam combo ? Im new to the lt1's(used to be a ford man). My mod's are pacesetter mid's into a 3inch catback, CAI, ported maf and t/b with a 3200stall and 3:73's in the rear. I wanted to know what cam I should match to the Edelbrock Performer 170cc heads that will keep my rpm's under 6500 and have good mid range.
Any and all input welcome.
Thanx
James
Any and all input welcome.
Thanx
James
Last edited by 1Bad00SS; Jan 3, 2008 at 09:30 PM.
Im gonna have to disagree with you on the ported maf being a mistake.....my car on a stock tune and these mods put down 297 though the converter on racerelated.com's dyno.
The reasons i want the edelbrock heads is cause im not lookin to have some crazy setup, my goals are to make about 360 to the ground.
no, there are emissions.
The reasons i want the edelbrock heads is cause im not lookin to have some crazy setup, my goals are to make about 360 to the ground.
no, there are emissions.
You need to understand how the MAF works, if you did you would understand why I say that was a bad mod. The MAF is NOT a restriction, if you gain power porting it that means the tune was too rich and porting the MAF essentially allows unmetered air to lean out the tune.
Edelbrock heads were an even bigger mistake then as 400rwhp is becoming commonplace with ported stock heads and daily driver friendly.
If you are going to blindly defend mistakes nobody is going to be able to help you.
We all made mistakes, most of us BIG ones like youre heads were. Those of us who go fast for a reasonable price admit those mistakes and learn from them.
Long as you have them you could get them ported.
Can you get specs on the springs they have and maybe we can come up with something that will work well with that is already there?
Edelbrock heads were an even bigger mistake then as 400rwhp is becoming commonplace with ported stock heads and daily driver friendly.
If you are going to blindly defend mistakes nobody is going to be able to help you.
We all made mistakes, most of us BIG ones like youre heads were. Those of us who go fast for a reasonable price admit those mistakes and learn from them.
Long as you have them you could get them ported.
Can you get specs on the springs they have and maybe we can come up with something that will work well with that is already there?
Don't take me the wrong way.....I was just making a point. my springs that i bought have a max ft of 600".
Btw....say If i were to go with a different set of heads then what combo do you think would be best to meet or exceed my goals.
Btw....say If i were to go with a different set of heads then what combo do you think would be best to meet or exceed my goals.
My combo would exceed your goals by 70rwhp. Whats your budget?
Lift rating alone is not enough info, cams these days are getting aggressive enough that we could tell you to run a cam with .550 lift and still have it float the valves on you.
speeddemon and I will both point you towards Advanced Induction.
A few times my heads and cam motor has gone over 6500rpms but a tweak to the 1-2 feed hole in the separator plate fixed that, it will still occasionally go a little over if the weather is awesome and the engine is pulling really hard, usually stays down around 6400 during the shift though, commanded at 6250.
Wife likes to drive the car, so it drives well, lockup is set very aggressively and it makes plenty of midrange to deal with that. Most passing situations on rural highways it doesn't even unlock the converter much less downshift, meaning it is pulling well by 2000rpms.
My heads are obsolete too, they don't even offer them anymore. No dyno numbers but mph too HP calculations say somewhere in the 390-410rwhp range with a mechanical WP and unlocked converter.
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I tend not to agree with caprice on some things, lol but he is absolutely right here.
You will want to return the MAF to stock if you are going with a heads/cam setup. If you don't it will be a pain in the *** to tune.
You can gain a little on the stock tune with a ported MAF because the stock tune is too rich. Porting the maf lets in more air than the computer reads it as so it can lean it up a little.
Once you start tuning (which you will need for heads/cam) you want a reliable, stock behaving MAF sensor.
You will want to return the MAF to stock if you are going with a heads/cam setup. If you don't it will be a pain in the *** to tune.
You can gain a little on the stock tune with a ported MAF because the stock tune is too rich. Porting the maf lets in more air than the computer reads it as so it can lean it up a little.
Once you start tuning (which you will need for heads/cam) you want a reliable, stock behaving MAF sensor.
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Ported MAF is ok as long as the tuner can tune for it. I have descreened Zo6 MAF on mine.
I would recommend a Comp Cams XE 230/236...should work good with those heads.
Or a Comp cams 306
Or a CComp Cams 305
OR a GM 847
OR a GTP6
David
I would recommend a Comp Cams XE 230/236...should work good with those heads.
Or a Comp cams 306
Or a CComp Cams 305
OR a GM 847
OR a GTP6
David
Ported MAF on a car at this level is nothing but a tuning headache, you have a 500rwhp car and yeah it can start to be a restriction and porting or using a larger one makes sense and you can deal with the tuning hassles.
4 out of the 5 cams you listed need to go beyond his intended rev limit and the 5th is a mediocre grind on a stupidly wide LSA.
Want to use a Comp off the shelf grind try the 503 at biggest. I would sooner say the Crane 227, LPE 211/219 or better yet get a cam ground right. The off the shelf stuff has compromised specs too improve emissions and drivability when too much duration is choosen as most people try to do and fatboy here directed you towards.
4 of those 5 are bigger(duration) than what speeddemon and I are running, we are not running the same cams either, just cams from the same company.
4 out of the 5 cams you listed need to go beyond his intended rev limit and the 5th is a mediocre grind on a stupidly wide LSA.
Want to use a Comp off the shelf grind try the 503 at biggest. I would sooner say the Crane 227, LPE 211/219 or better yet get a cam ground right. The off the shelf stuff has compromised specs too improve emissions and drivability when too much duration is choosen as most people try to do and fatboy here directed you towards.
4 of those 5 are bigger(duration) than what speeddemon and I are running, we are not running the same cams either, just cams from the same company.
It is very difficult to just guess at an accurate table for an arbitrarily ported stock MAF.
A lot of professional tuners will not even want to mess with a car that has that.
Teching In
Joined: May 2007
Posts: 41
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From: Long beach Ca
Im new to the lt1's(used to be a ford man). My mod's are pacesetter mid's into a 3inch catback, CAI, ported maf and t/b with a 3200stall and 3:73's in the rear. I wanted to know what cam I should match to the Edelbrock Performer 170cc heads that will keep my rpm's under 6500 and have good mid range.
Any and all input welcome.
Thanx
James
Any and all input welcome.
Thanx
James
I have seen ALL of those cams run VERY well in 355's and 383's. EXCEPT for the CC305.
Just because what YOU have works, does NOT mean other combos dont work as well.
As far as the rpm limit....bunch of crap....the cam is not the only determining factor. I have seen those cams all in stock headed engines do fairly well.
Everyone says my 250CC headed 383, super vic 254/254@.050 on a 106 should make power to the MOON.....it peaks(flattens out) at 6600.
David
Just because what YOU have works, does NOT mean other combos dont work as well.
As far as the rpm limit....bunch of crap....the cam is not the only determining factor. I have seen those cams all in stock headed engines do fairly well.
Everyone says my 250CC headed 383, super vic 254/254@.050 on a 106 should make power to the MOON.....it peaks(flattens out) at 6600.
David
Im new to the lt1's(used to be a ford man). My mod's are pacesetter mid's into a 3inch catback, CAI, ported maf and t/b with a 3200stall and 3:73's in the rear. I wanted to know what cam I should match to the Edelbrock Performer 170cc heads that will keep my rpm's under 6500 and have good mid range.
Any and all input welcome.
Thanx
James
Any and all input welcome.
Thanx
James
I know he has the heads, doesn't mean we should pretend it was a good idea.
You guys seem to think I say only my setup will work but that is just because you are stupid kids who blindly argue with me.
I listed 3 different cams I have never run, but that results show will make great power and stay within his self imposed rev limit.
onepahtz28, have any heads and cam experiance???
Fastfatboy, betting your intake has something to do with the rpms your motor likes, well known the LT1 intake raises the rpm band for a cam.
You guys seem to think I say only my setup will work but that is just because you are stupid kids who blindly argue with me.
I listed 3 different cams I have never run, but that results show will make great power and stay within his self imposed rev limit.
onepahtz28, have any heads and cam experiance???
Fastfatboy, betting your intake has something to do with the rpms your motor likes, well known the LT1 intake raises the rpm band for a cam.
I would agree with some of the others above about useing a smaller cam with those heads. I think that something along these lines would work better for your mods:
adv. duration 286*/286*
@.050" dur. 218*/218*
lift w/1.5 rockers .510"/.510"
LSA 110*
ICL 105*
adv. duration 286*/286*
@.050" dur. 218*/218*
lift w/1.5 rockers .510"/.510"
LSA 110*
ICL 105*
I argue with you because 99% of the time you put people down. If you know he already had the heads, why tell him the heads were a bad idea, The question was what cam would go with those heads. Not, hay did I make a bad choice on these heads. Some people don't have a lot of money and those heads are cheap.
With your set up I would go with the CC503. With a GOOD tune
I would say you would make the HP you want . The tune is what is going to make you or brake you.
Good luck with your car man.
Just because someone has a part I do not see a reason to pretend it is good. People who want to learn actually appreciate being told about genuine mistakes so they can correct them.
Why aren't you arguing for the ported MAF too?
Why aren't you arguing for the ported MAF too?