Heads for an 85
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Heads for an 85
http://store.summitracing.com/egnsea...115+4294925023
Summit is offering "Street & Strip Cylinder Heads"
Do you think they are comparable to AFR or other heads?
Here is the description:
"Don't sacrifice quality for a low price--get both with a set of our Summit Racing Street & Strip® cylinder heads for small Chevy. The lightweight heads are cast from A-356 aluminum alloy and have 200cc intake ports, 64cc combustion chambers, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have 2.02 in. intake and 1.60 in. stainless steel exhaust valves, 1.470 in. hydraulic rollers valve springs, 7 degree valve locks, 3/8 in. rocker arm studs, and 5/16 in. guideplates."
I would change the rockers to 1.6 right?
Summit is offering "Street & Strip Cylinder Heads"
Do you think they are comparable to AFR or other heads?
Here is the description:
"Don't sacrifice quality for a low price--get both with a set of our Summit Racing Street & Strip® cylinder heads for small Chevy. The lightweight heads are cast from A-356 aluminum alloy and have 200cc intake ports, 64cc combustion chambers, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have 2.02 in. intake and 1.60 in. stainless steel exhaust valves, 1.470 in. hydraulic rollers valve springs, 7 degree valve locks, 3/8 in. rocker arm studs, and 5/16 in. guideplates."
I would change the rockers to 1.6 right?
Advanced
Joined: Nov 2008
Posts: 92
Likes: 0
From: Meridian Mississippi
I wouldn't think that these heads are comparable to AFR heads. In my expierince you get what you pay for. If they are such great heads why are they selling them for so cheap? Another thing I wouldn't reccomend getting anything less than a 215 intake ports. If I were going to drop the money on some aluminum heads, I would save my money and get something like AFR or trick flow whatever it is you want, that way you know you are getting quality. I really like the AFR heads. I have heard a lot of good things about them. What mods do you have done to your engine and what do you plan on doing to it in the future?
Advanced
Joined: Nov 2008
Posts: 92
Likes: 0
From: Meridian Mississippi
Oh one more thing. 1.6 rockers make your cam "think" that it is bigger. If you are pushing the limit on your cam size as it is then dont buy 1.6 rockers. If you have something like a stock or mild cam then 1.6 rockers will help you. While I had the motor apart I would replace the cam with what you want. I would call comp cams and tell them what you want you engine to do and then when they reccomend a cam for your car ask them what heads they would reccomend as far as intake runners and valve sizes. I like to build my motor around the camshaft that way I know that everything will work together well.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Right now the motor is basically stock, except for little mods like cut air lid, K&N filter, cutback plugs, accel super coil. In the next month i plan on putting a 2.25" true dual exhaust system with LT-1 style mufflers on it, then i am going to get a FIRST intake, so i figured while i have the intake off, i might as well go for heads and rockers, possibly cam. Its not going to be a track car, mainly a street car and take it to the track for 1/4 times maybe 3-4 times a summer.
i am also going to put Bosch III 24 lb injectors in it from FIC before all of the stuff listed above. One is bad, so i figure they are all on the brink of going..might as well replace em all.
Also, where do you get AFR heads from? JEGS or summit or something?
i am also going to put Bosch III 24 lb injectors in it from FIC before all of the stuff listed above. One is bad, so i figure they are all on the brink of going..might as well replace em all.
Also, where do you get AFR heads from? JEGS or summit or something?
Last edited by Pwnage1337; Jan 27, 2009 at 04:48 PM.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
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That's pretty good for a cast 200cc head -- especially if you can verify flow numbers. Many head porters will tell you aftermarket heads don't always flow as advertised. For that runner size, they don't flow as well as AFR -- but they aren't CNC ported. It's reasonable to directly compare to TFS, Edelbrock, Dart, Canfield, Vortec, Fastburn or any cast SBC head.
See if you can find feedback on quality/flow.
Compare their pricing to TFS, AFR, and others. Look at flow too -- especially in the ..300"-.400" lift range. They spend way more time at that height than at peak.
The more air your flow, generally the more power you can make. If cost is important, then it can dictate your choices.
See if you can find feedback on quality/flow.
Compare their pricing to TFS, AFR, and others. Look at flow too -- especially in the ..300"-.400" lift range. They spend way more time at that height than at peak.
The more air your flow, generally the more power you can make. If cost is important, then it can dictate your choices.
Last edited by GREGGPENN; Jan 27, 2009 at 05:42 PM.
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Race Director
Joined: Jun 1999
Posts: 14,924
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From: Merritt Ils Fl
Those flow numbers don't mean squat.Noway are you going to get .600 lift . Summitt owns Trick Flow. I wonder if these heads are an El Chepo version of an older Trick Flow head? I don't know. Summitt is not known for selling junque so I would guess the heads are worth the price.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
I really believe that the 200 cc are too big for your 85 without major changes to the cam. Again, let me urge you to read Vader86's web site.
Without going to a bigger cam, and really dumping the intake, runners and plenum you will not see major gains. Go with a set of 180-190 heads or smaller. This would not be a good fit for your car.
Without going to a bigger cam, and really dumping the intake, runners and plenum you will not see major gains. Go with a set of 180-190 heads or smaller. This would not be a good fit for your car.
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
I really believe that the 200 cc are too big for your 85 without major changes to the cam. Again, let me urge you to read Vader86's web site.
Without going to a bigger cam, and really dumping the intake, runners and plenum you will not see major gains. Go with a set of 180-190 heads or smaller. This would not be a good fit for your car.
Without going to a bigger cam, and really dumping the intake, runners and plenum you will not see major gains. Go with a set of 180-190 heads or smaller. This would not be a good fit for your car.
For a street car you may want 180 or 190s. 200s will be overkill.
Drifting
Joined: Feb 2008
Posts: 1,267
Likes: 27
From: Texas
I haveDart iron eagles with 200cc runners on my 383 with stock cam and 1.6 roller rockers
swtiching from the stock heads to the darts even with the 200cc runners gave me a BIG in your face change in power.
swtiching from the stock heads to the darts even with the 200cc runners gave me a BIG in your face change in power.
Drifting
Joined: May 2006
Posts: 1,428
Likes: 7
From: Chewelah Wa
I agree that 200cc's is a bit much....as far as being comparable to AFR's etc, thats a moot point.....any aftermarket aluminum head will be a huge improvement over the stock 85 head. I believe the stock ones are in the 165 cc range. My 85 is in the market for an upgrade in that department, and I was also looking at those heads. If your on a budget, the pro Comp 190's are around 650 bucks.
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
Lot of times mfrs of heads post some .600 lift # so their head looks marketable. For a TPI car who cares what it makes there?
Look for something strong in the low-mid lifts up t0 500+-.
Fwiw 176 @ 600 is SUPER weak, especially for a 200cc head. I got 202 out of a TPI exh port (@600) which isnt really impressive (but not bad) with puny stock exhaust valves/no special cutting done on them so what does that tell you?
If it was at a lower lift it would be more attractive.
Look for something strong in the low-mid lifts up t0 500+-.
Fwiw 176 @ 600 is SUPER weak, especially for a 200cc head. I got 202 out of a TPI exh port (@600) which isnt really impressive (but not bad) with puny stock exhaust valves/no special cutting done on them so what does that tell you?
If it was at a lower lift it would be more attractive.
Team Owner
Joined: Sep 2001
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From: Athens AL
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200cc is a bit much considering your plans, and you will need new heads, that much is for sure.
These particular heads are probably worth the price, I just wouldnt buy this set. I would look for something smaller in port size, which may flow better, as most have suggested.
These particular heads are probably worth the price, I just wouldnt buy this set. I would look for something smaller in port size, which may flow better, as most have suggested.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
I agree! When I contacted AFR regarding heads for my 85, they recommended 180's. With the mods he is talking about, there's more than enough flow. I don't understand why people get concerned with flow at .600 lift? I'd be looking at the numbers between .400 and .500 where the majority of cams perform.
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
I'm not really educated on the Cam/Heads part of the engine yet. I'm only 17, but I have much to learn. What heads would you recommend for a setup like this (help me with cam?):
FIRST Plenum/Runners/Manifold Combination thing from First Fuel Injection
True Dual Exhaust (2.25") w/ Hedmans Elite Hedders
Open Air Lid w/ K&N filter
Berry scented air freshener (gotta have one)
FIRST Plenum/Runners/Manifold Combination thing from First Fuel Injection
True Dual Exhaust (2.25") w/ Hedmans Elite Hedders
Open Air Lid w/ K&N filter
Berry scented air freshener (gotta have one)
Pro
Joined: Mar 2008
Posts: 702
Likes: 0
I'm not really educated on the Cam/Heads part of the engine yet. I'm only 17, but I have much to learn. What heads would you recommend for a setup like this (help me with cam?):
FIRST Plenum/Runners/Manifold Combination thing from First Fuel Injection
True Dual Exhaust (2.25") w/ Hedmans Elite Hedders
Open Air Lid w/ K&N filter
Berry scented air freshener (gotta have one)
FIRST Plenum/Runners/Manifold Combination thing from First Fuel Injection
True Dual Exhaust (2.25") w/ Hedmans Elite Hedders
Open Air Lid w/ K&N filter
Berry scented air freshener (gotta have one)
Race Director
Joined: Jun 2004
Posts: 13,961
Likes: 707
From: WI
I'm not really educated on the Cam/Heads part of the engine yet. I'm only 17, but I have much to learn. What heads would you recommend for a setup like this (help me with cam?):
FIRST Plenum/Runners/Manifold Combination thing from First Fuel Injection
True Dual Exhaust (2.25") w/ Hedmans Elite Hedders
Open Air Lid w/ K&N filter
Berry scented air freshener (gotta have one)
FIRST Plenum/Runners/Manifold Combination thing from First Fuel Injection
True Dual Exhaust (2.25") w/ Hedmans Elite Hedders
Open Air Lid w/ K&N filter
Berry scented air freshener (gotta have one)
Thread Starter
Tech Contributor
Joined: Oct 2008
Posts: 3,729
Likes: 190
From: Custer, WI
Where would I find a 2.5" exhaust? MAM, CPC, and Ecklers all have only 2.25"
The system i was looking at is 2.25" alumnized steel, manifold back so there isn't any cats or anything.
I saw a chart somewhere that said that 2.25" will be sufficient for engines making less than 350 HP. is that true?
What about these heads?
http://www.fastengineparts.com/produ...ew.php?id=2370
The system i was looking at is 2.25" alumnized steel, manifold back so there isn't any cats or anything.
I saw a chart somewhere that said that 2.25" will be sufficient for engines making less than 350 HP. is that true?
What about these heads?
http://www.fastengineparts.com/produ...ew.php?id=2370
Last edited by Pwnage1337; Jan 28, 2009 at 02:18 PM.