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Old 10-15-2013, 10:14 PM
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heads for tunnel ram

im looking to update my heads. currently running 993 heads. and looking for something to give me more edge at the strip. thinking of goin afr 220cc heads. i have a 250 @ 50 soild flat isky cam in the box. i know a tunnel ram makes heads better so maybe a afr 195?? or less head....what r your thought.

56 belair gasser
383ci
weiland tunnel two 500
stock cam and 993 heads
tremec 5spd
12 bolt posi 4.11

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Old 10-16-2013, 06:39 AM
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put 2 x 750s on the TR.buy a solid roller cam. The 220s are good for a serious engine.
what RPM range is the short block built for? Is this a serious 600 hp engine? or is it a mild street engine application?
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Old 10-16-2013, 08:24 AM
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The bottom end is a stock 350 with a stock 400 crank and stock 350 rods n piston. Previous 383 I have used the 195 with victor intake without longevity problems. I would like to go solid roller but its outta the budget. Rather put money into the heads.

You think a smaller head is better for tunnel rams?? Bottom end aside do tunnel ram perform better with a small intake runner or smaller valve.

Last edited by 68NovaSS; 11-01-2013 at 10:49 AM.
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Old 10-16-2013, 09:17 AM
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Pick the heads based on your cam and what you're actually going to do with this. Your axle and trans choice says you're building the motor to rev. We have seen several instances where really aggressive hydraulic flat tappet cams have a high failure rate due to lack of quality cam cores; and the reduction of the extreme pressure lubricants in modern oils. If you're building this to race consistently; go rollercam and the 220 heads. However, I don't think your bottom end is built for "serious." I'm not saying that to be rude or derogatory, but I wouldn't use factory bottom end parts in a severe duty application, especially if the price of a roller cam isn't in the budget. My personal opinion, go with a cheaper head, like an IK180 and spend the money on the roller cam.
My advice given your parameters? Go with the smaller head and use a solid flat tappet cam and keep your revs under 5500. Did you use quality, new fasteners for the mains and rods?

Last edited by AutoGear; 10-16-2013 at 09:24 AM.
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Old 10-16-2013, 09:32 AM
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If you want to get an edge at the strip you need more RPM and putting smaller heads will not work. The motor need to spin to 6700 - 7000 RPM. Stick with the AFR 220 heads. Go go for a bigger rear, more compression and a roller cam.

Last edited by lg1969; 10-16-2013 at 09:38 AM.
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Old 10-16-2013, 12:30 PM
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Quote:
Originally Posted by OMARS67 View Post
The bottom end is a stock 350 with a stock 400 crank and stock 350 rods n piston. Previous 383 I have used the 195 with victor intake without l
So no, its not a full tilt motor then...
OK, so for what your going to spend on the AFR's take a step back and look at a cheaper alternative.
Look at a set of Pro-filer 195's at right around $1100.00
Then use the extra money to go with a roller cam, I wouldnt bother with a solid personally as your not going to be turning the stock parts past 6500 anyways.
Get some 750's on the TR
This would be lots of fun in a stick car and low maintanence
http://www.summitracing.com/int/part...make/chevrolet
You need lots of initial timing with your TR
With this cam I would likely just lock it out at 36* ish and call it good.

This will be worlds apart from what you have.
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Old 10-16-2013, 12:36 PM
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If you want to get an edge at the strip you need more RPM and putting smaller heads will not work. The motor need to spin to 6700 - 7000 RPM. Stick with the AFR 220 heads. Go go for a bigger rear, more compression and a roller cam.
"An edge on the strip" means many things, its a gasser car, likely a small tire, and a straight axle....stock cam, 993 heads, stock bottom end.....no sense reinventing the wheel....the smallest of cams and almost any aftermarket heads, even procomp, is going to get him down the track faster.
Bigger gear, bigger heads, more compression is great if its a racecar......
The 220's are going to be overkill by a long shot.
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Old 10-16-2013, 01:27 PM
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Thanks guys. I think ill keep it at 195cc. If I go solid roller should I invest in the isky roller bearing lifters. There way more than regular roller lifter. What duration should I go with??
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Old 10-16-2013, 01:52 PM
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Thanks guys. I think ill keep it at 195cc. If I go solid roller should I invest in the isky roller bearing lifters. There way more than regular roller lifter. What duration should I go with??
What's the primary use of the vehicle?
How much strip vs street?
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Old 10-16-2013, 01:56 PM
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Thanks guys. I think ill keep it at 195cc. If I go solid roller should I invest in the isky roller bearing lifters. There way more than regular roller lifter. What duration should I go with??
Street/strip, weekend toy that makes some noise and pulls hard.
http://www.summitracing.com/int/part...make/chevrolet
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Old 10-16-2013, 10:50 PM
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The profiler 195s will be a compromise.The smaller solid cam will work ok with the stockish bottom end.Listen to Daves ideas,it will make 480 ish HP with proper carbs
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Old 10-17-2013, 12:54 AM
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The Brodix IK200 heads would be very good for this project.
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Old 10-17-2013, 03:59 AM
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You will find the Isky Cams Solid lifter "Hi-Rev" flat tappet cams very suitable for this build.

EG: Isky Z-27 201027 street strip Or Isky 534A 201534 or Isky 547-B 201549 if you are a bit more serious.

10:1 cr+ 3500+stall W/auto trans 4.10+gears.
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Old 10-17-2013, 05:51 PM
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You will find the Isky Cams Solid lifter "Hi-Rev" flat tappet cams very suitable for this build.

EG: Isky Z-27 201027 street strip Or Isky 534A 201534 or Isky 547-B 201549 if you are a bit more serious.

10:1 cr+ 3500+stall W/auto trans 4.10+gears.
Thanks fbird do u think rhs heads 200 would b as good as brodix 200
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Old 10-17-2013, 06:06 PM
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Thanks fbird do u think rhs heads 200 would b as good as brodix 200
i don't know... I like the brodix IK200 and the Profiler 195's or 210's

Summit Racing Brand 200cc port Aluminum SBC heads are the same thing as the Brodix heads. Except they say Summit on them.
I recommend any one of these for your needs.
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