Need help engine guru's
Thread Starter
Pro
Joined: Jul 2003
Posts: 543
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From: DFW Texas
Need help engine guru's
Well guys if it ain't one thing it's another. I am putting together a 383 for my 91. I have already been using an Accel SR base intake manifold and some Edelbrock Hiflo runners with a ported plenum with my 113 heads on my 350. I figured I would go with a SR plenum later this year after toying with the 383 for a while. Anyway, I bought a set of Brodix RR200 heads and, well, the stupid intake runners are set up for a 1206 intake gasket and the intake manifold was using a 1204. Bottom line is the manifold will not even cover up the intake ports on the heads at the top. I know this all sounds like I am a dumb rookie at all this, I have assembled many SBC's. It just never occurred to me that the intake port could be that dang tall. Suggestions for this intake or for another intake choice please. 
Greg
Greg
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Yepper. Take the intake to your local welding guru, and have him just keep laying beads along that edge until its built up enough to cover and then some.
Then you can port them out to match up to the heads.
That is about all you can do. Or return the heads for 180cc or next ones down that use 1204.
IMHO, 200cc heads are WAY too large for a 383, especially one that has a SR onto of it that is going to be done at 5500rpms. You have a mismatch of multiple proportions with the 200cc heads.
Then you can port them out to match up to the heads.
That is about all you can do. Or return the heads for 180cc or next ones down that use 1204.
IMHO, 200cc heads are WAY too large for a 383, especially one that has a SR onto of it that is going to be done at 5500rpms. You have a mismatch of multiple proportions with the 200cc heads.
Last edited by ski_dwn_it; Mar 15, 2006 at 10:29 PM.
Thread Starter
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Joined: Jul 2003
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From: DFW Texas
Thanks Pete and Jesse. That was my first thought as well. Weld it up and re-port. I agree Jesse, that will result in the relatively small intake man port dumping into the large head port and lose velocity. All of this is due to poor planning on my part. Can't return the heads, already did some clean up and torqued them down.
FYI, my past learning was done on a SBC 400 ci chevelle. It had a small flat, hyd, cam and TH 400 with 4.10 gear. It ran 11.70's with a 1.6 60 ft times. I used Dart sportsman 200CC heads and victor Jr intake matched to 1205 gaskets. RPM's never exceeded 6g. The car would pull like mad throught the first 1/8.
As far as the vette, I never planned past 5500-6000 rpm's. I will have to think about this for a while. Thanks for the help guys.
Greg
FYI, my past learning was done on a SBC 400 ci chevelle. It had a small flat, hyd, cam and TH 400 with 4.10 gear. It ran 11.70's with a 1.6 60 ft times. I used Dart sportsman 200CC heads and victor Jr intake matched to 1205 gaskets. RPM's never exceeded 6g. The car would pull like mad throught the first 1/8.
As far as the vette, I never planned past 5500-6000 rpm's. I will have to think about this for a while. Thanks for the help guys.
Greg
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
No problem greg, you may want to consider selling them on the 4sale section or EBay. and put that money towards a good 180-190cc head. Just a thought.
If your not looking to set the world on fire, I am sure the car will be powerful feeling. But if your looking for the best you can get, then an above said plan is probably best.
383-400ci motor makes a pretty good diffence. If you were at 400+ in, the 200s might not be large enough.
AFR probably makes the best head available in the 180-190 CFM range. With some porting you can get some pretty phenominal numbers out of them - our race group has a set that flow well over 300cfm
If your not looking to set the world on fire, I am sure the car will be powerful feeling. But if your looking for the best you can get, then an above said plan is probably best.
383-400ci motor makes a pretty good diffence. If you were at 400+ in, the 200s might not be large enough.
AFR probably makes the best head available in the 180-190 CFM range. With some porting you can get some pretty phenominal numbers out of them - our race group has a set that flow well over 300cfm
Melting Slicks
Joined: Feb 2002
Posts: 2,699
Likes: 2
From: The Black Hole LA
The exact same thing happenned to me last year. I tried to find the threads with the search function, but we all know how well that works. Anyway I had a set of Track 1 heads, a perfect match to a 1206, only problem is this biggest you can go on a Super Ram base is 1205 gasket. Consensus was to go with a different set of heads because the super ram wouldn't support the flow the brodix heads required and would actually hurt my power, especially in the lower RPM range I wanted it in. Wasn't that big of a deal because I bought the heads used so I sold them for pretty much what I bought them for it just took a couple months. I went with a set of Dart Pro 1 200 cc heads, perfect fit. Others suggested the AFR 190 heads, but they are a little pricey for me and were having quality issues at the time I purchased anyway.
It is possible to have the intake welded up, and I asked around this small town for someone to do it and no one wanted to fool with it because of the risk of messing up an expensive intake manifold.
Other options are the Miniram, which is apparently a perfect match to the 1206 gasket, or a single plane intake.
It is possible to have the intake welded up, and I asked around this small town for someone to do it and no one wanted to fool with it because of the risk of messing up an expensive intake manifold.
Other options are the Miniram, which is apparently a perfect match to the 1206 gasket, or a single plane intake.
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Thread Starter
Pro
Joined: Jul 2003
Posts: 543
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From: DFW Texas
OK guys. I've spent a few hours looking at past MR posts here. Thirdgen.org is down right now so I can't go there. The main problems I have found with the MR is the thermostat housing and the EGR. I have seen a few remedies for the thermostat and I believe I can handle that. I have not seen much regarding the EGR problem. I have to pass the sniffer to drive on the streets around here. What are some solutions for the EGR dilemma?
Melting Slicks
Joined: Feb 2002
Posts: 2,699
Likes: 2
From: The Black Hole LA
Originally Posted by Runum
What are some solutions for the EGR dilemma?
As far as I know there are none, I researched the two intakes pretty good before choosing the SuperRam. Although I chose the SuperRam for the lower power band, Sniffers are not a concern around here.
