C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Yet another 383 build

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Old Sep 28, 2008 | 10:44 AM
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Default Yet another 383 build

Decided that I'm doing it.
ECM and Fuel delivery is not a problem.
Already have the 350 4 bolt main, and its out getting the Scat stroker kit now, should have it back in about 2 weeks.
Decided on this head
http://store.summitracing.com/partde...5&autoview=sku
Having trouble deciding on a cam but so far this is what I've got
http://www.compcams.com/Cam_Specs/Ca...?csid=208&sb=0

D44 rearend 3.45
PeteK 9.5 stall 2500

Opinions? Thoughts? My goals are simple, Neck snapping tq
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Old Sep 28, 2008 | 10:45 AM
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Originally Posted by qws
Decided that I'm doing it.
ECM and Fuel delivery is not a problem.
Already have the 350 4 bolt main, and its out getting the Scat stroker kit now, should have it back in about 2 weeks.
Decided on this head
http://store.summitracing.com/partde...5&autoview=sku
Having trouble deciding on a cam but so far this is what I've got
http://www.compcams.com/Cam_Specs/Ca...?csid=208&sb=0

D44 rearend 3.45
PeteK 9.5 stall 2500

Opinions? Thoughts? My goals are simple, Neck snapping tq
Short and sweet, you will love it.
Reply
Old Sep 28, 2008 | 10:48 AM
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That's a great head. Just know that the only conifg is a straight plug. Check with the headers you choose you can use a straight plug configuration.

Nice setup, you'll love it.

Oh, if you call Brodix and spend $200 they will CNC the bowls and clean up the runners a bit. Money well spent.
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Old Sep 28, 2008 | 10:50 AM
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Thanks Pete
JSUP- the only reason I started looking into those is because I was following your threads
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Old Sep 28, 2008 | 10:53 AM
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Originally Posted by qws
Thanks Pete
JSUP- the only reason I started looking into those is because I was following your threads
The added torque may bump the stall up a couple of hundred rpm also.
Should be perfect, in my opinion.
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Old Sep 28, 2008 | 10:54 AM
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Originally Posted by qws
Thanks Pete
JSUP- the only reason I started looking into those is because I was following your threads
Thanks dude. They are a terrific head. Just make sure they fit, that's all I'm saying. If your headers require angled plugs, it could be an issue. Just a heads up. I am not saying they won't work, just throwing that out there for you so you're not surprised once you go to mount your headers.

I wound up having to go to the Race Rites because I needed angled plugs with my headers. I found that out only because when I spoke to Brodix, they asked the question. Little things that can cause big problems later.

For the money, hard to beat these heads.
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Old Sep 28, 2008 | 11:09 AM
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The heads I have now are for straight plugs... learned that when I first got em. So the headers should work fine
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Old Sep 28, 2008 | 11:11 AM
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Originally Posted by qws
The heads I have now are for straight plugs... learned that when I first got em. So the headers should work fine
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Old Sep 28, 2008 | 01:51 PM
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Originally Posted by jsup
That's a great head. Just know that the only conifg is a straight plug. Check with the headers you choose you can use a straight plug configuration.

Nice setup, you'll love it.

Oh, if you call Brodix and spend $200 they will CNC the bowls and clean up the runners a bit. Money well spent.
Thats a great head ? What is great about it ?
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Old Sep 28, 2008 | 01:55 PM
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Originally Posted by qws
The heads I have now are for straight plugs... learned that when I first got em. So the headers should work fine
As Jsup said, most headers for C4 L98's require an angled plug....thus they even have their own name, the L98 version by some manufacturers. I would double check if you're unsure, otherwise one of the primaries and perhaps multiple you would have pound out considerably sized dimples..... clearance of your plug and boot become a real biotch..... I've seen somebody do it, its pretty ugly.

Good Luck with your build !! I raced a 383 tpi motor for many, many years and had a blast with it
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Old Sep 28, 2008 | 02:22 PM
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If you want a low rpm torquey motor, you just built it.

YOu gonna use TPI?

That cam is mild on a 350 let alone a 383. That head is small for a 350 let alone a 383 Shall be a TORQUE monster and a decent match for a TPI intake system.

I'd actully look into the IK200's if you want to stick with those heads. Alittle larger port and more flow for that bigger 383, shall work out nicely.

If comp made a 224/230 xfi grind, i'd recommend that or else the cc503 cam would be a nice choice. Will make loads of torque and give you abit more hp to boot. There is a point where too much torque is bad and you'll discover trying to hook up on that power will not be that easy lol
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Old Sep 28, 2008 | 02:48 PM
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I've been doing some dyno simulations on the computer and can see that maybe the 200cc runners would be better.
I'm not going TPI, I can easily flow 700-750 cfm using the intake I have now just by making some minor adjustments. Computer tuning is not an issue as well, and will get some dyno/tune time once the motor is completed.
The cam I selected in not a definate at this point, just a starting point. So any suggestions are welcome
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Old Sep 28, 2008 | 03:01 PM
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Originally Posted by Beach Bum
Thats a great head ? What is great about it ?
I read it in the Brodix brochure and it said so. I heard on the interweb people are making sick power with those. I saw a guy at the track once that had them, and his car was really fast. All the cool kids buy them.

You have to look at people who have walked the walk. Who have been there. Many really fast cars run Brodix and that is the reason why they are fast. Time slips don't lie. Dyno numbers don't lie. Look under the curve on on the table. It's all there. Or is it under the table or on the curve? I don't remember..

I mean, check this out:

http://www.brodix.com/media/images/a....07ChevyHP.pdf

What else do you need to know, it's all there. That pic right there is the basis of many auto erotic exercise, I mean who wouldn't?

Call Joe at Brodix, they will help you honestly and accurately pick exactly the head you need. The best for your application.

Last edited by jsup; Sep 28, 2008 at 03:13 PM.
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Old Sep 28, 2008 | 03:05 PM
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Originally Posted by Orr89rocz
If you want a low rpm torquey motor, you just built it.

YOu gonna use TPI?

That cam is mild on a 350 let alone a 383. That head is small for a 350 let alone a 383 Shall be a TORQUE monster and a decent match for a TPI intake system.

I'd actully look into the IK200's if you want to stick with those heads. Alittle larger port and more flow for that bigger 383, shall work out nicely.

If comp made a 224/230 xfi grind, i'd recommend that or else the cc503 cam would be a nice choice. Will make loads of torque and give you abit more hp to boot. There is a point where too much torque is bad and you'll discover trying to hook up on that power will not be that easy lol
Good point.

http://brodix.com/heads/compression.html

Based on compression, Brodix recommends as large as 210cc. Compression will be a factor to consider.

Call them, they can help you out....

Last edited by jsup; Sep 28, 2008 at 03:17 PM.
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Old Sep 28, 2008 | 03:18 PM
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Originally Posted by jsup
I read it in the Brodix brochure and it said so. I heard on the interweb people are making sick power with those. I saw a guy at the track once that had them, and his car was really fast. All the cool kids buy them.

You have to look at people who have walked the walk. Who have been there. May really fast cars run Brodix and that is the reason why they are fast. Time slips don't lie. Dyno numbers don't lie. Look under the curve on on the table. It's all there. Or is it under the table or on the curve? I don't remember..

I mean, check this out:

http://www.brodix.com/media/images/a....07ChevyHP.pdf

What else do you need to know, it's all there. That pic right there is the basis of many auto erotic exercise, I mean who wouldn't?

Call Brodix, they will help you honestly and accurately pick exactly the head you need. The best for your application.
I would guess you're trying to be a smart-*** or something with this response..... I don't even know or care.

I was simply asking, why you think those RR 180 cc cylinder heads were great ? Quite frankly, what I see is a weak head that stalls out at 500 lift at slightly over 240 cfm.... by todays standards, these are the kiddie cylinder heads. The RR 200 cc cylinder head would more than likely be a much better choice for the posters set-up .....

But whatever dude....
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Old Sep 28, 2008 | 03:32 PM
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Maybe I missed it, but what intake are you going with? Keep an open mind in choosing a cylinder head.
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Old Sep 28, 2008 | 03:34 PM
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Originally Posted by Beach Bum
I would guess you're trying to be a smart-*** or something with this response..... I don't even know or care.

I was simply asking, why you think those RR 180 cc cylinder heads were great ? Quite frankly, what I see is a weak head that stalls out at 500 lift at slightly over 240 cfm.... by todays standards, these are the kiddie cylinder heads. The RR 200 cc cylinder head would more than likely be a much better choice for the posters set-up .....

But whatever dude....
OK, thought you were being sarcastic. Sorry about that. Here's my real answer:

Brodix has been in business since 1973, that's 35 years. In that time they have developed a reputation of having impeccable fit and finish and using high quality components.

The most important point:

The engine builders I have spoken to during my first rendition of my motor each and every one of them said Brodix was their first choice for heads in terms of fit, finish, casting quality, and reputation. The perception in these circles of the IKs has been consistent with the reputation of Brodix in racing and high performance circles. Which is why my first choice was the IKs until which time I learned of the angle plug problem.

Posted here a while back was an article that had the 180s on a motor making over 500 HP.

On top of first hand experience from engine builders, many "independent" sources have been touting the IKs as the right head for the money in terms of results and pricing. This includes magazine articles and web based opinions. Take those for what they are worth. Everyone has a marketing department.

Last edited by jsup; Sep 28, 2008 at 03:37 PM.
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To Yet another 383 build

Old Sep 28, 2008 | 03:38 PM
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Originally Posted by 88BlackZ-51
Keep an open mind in choosing a cylinder head.
That's rich...
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Old Sep 28, 2008 | 03:41 PM
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If you dont mind me asking about how much is it going to cost you for the build from start to turn key? PM me if you would rather do that.
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Old Sep 28, 2008 | 03:51 PM
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Originally Posted by pearlvett
If you dont mind me asking about how much is it going to cost you for the build from start to turn key? PM me if you would rather do that.
I could offer a general number based on my prior builds:
Complete machining of block $600
Heads $1200
Budget rotating assembly, balanced $1100
Misc (gaskets, oil, oil pump freeze plugs etc) $400
Assembly of long block $450
cam, lifters, etc $300-$1000 depending on flat tappet or roller
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