Ported heads, intake, throttle body
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 2,728
Likes: 142
From: Iowa
Ported heads, intake, throttle body
Looking at different things to do on my current build. It's a forged 346 with an A&A Si-Trim, 3.4 pulley (12psi), blower cam, and longtubes. Sitting at 638rwhp/550rwtq.
Has anyone ported a set of the oem 243 heads, intake, or throttle body on an FI build? If so, what were the results. Curious if it's worth the money and effort.
What about other heads, intake, throttle body options?
Has anyone ported a set of the oem 243 heads, intake, or throttle body on an FI build? If so, what were the results. Curious if it's worth the money and effort.
What about other heads, intake, throttle body options?
Racer
Joined: May 2007
Posts: 478
Likes: 58
The Fast 102mm Intake and the LS2 Throttle Body are better than the C5........ I have those 3 things but I'm N/A going into FI within the next 3 months.
I had the NW 102mm Throttle Body but had to take it out, too many problems at idle. Maybe for our cubic inch all we need is the fast 92mm intake but oh well, I bought it already.
See my signature for more details on my setup.
I had the NW 102mm Throttle Body but had to take it out, too many problems at idle. Maybe for our cubic inch all we need is the fast 92mm intake but oh well, I bought it already.
See my signature for more details on my setup.
Racer
Joined: May 2007
Posts: 478
Likes: 58
If I knew before what I know now I would have never replaced the stock throttle body and the ls6 intake. This is difficult to explain unless you experience idle issues yourself but at this point I can't roll back.
Drifting
Joined: Aug 2008
Posts: 1,399
Likes: 30
Can you pulley down to 3.2-3.3"? Intake and heads will net you small gains. Meth injection might be more useful if you don't already have it. It will let you run more timing and run safer.
Last edited by ysb02; Dec 20, 2016 at 07:16 AM.
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 2,728
Likes: 142
From: Iowa
If anyone has been using a supercharger, and then ported the LS6 heads and throttle body, I'd really like to hear what the results were.
Last edited by Quickshift_C5; Dec 20, 2016 at 09:23 AM.
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Drifting
Joined: Aug 2008
Posts: 1,399
Likes: 30
I'd skip the TB (read instances of people going back to stock for FI) since it's a headache for minimum hp gain and maybe just do the heads. The gains from ported heads might be more than N/A, maybe 30-40 rwhp at best? Some of the FAST intakes were suspected to leak under boost but there's plenty of people using them I think. It's generally a lot of money spent for minimum gain.
Best bang for the buck might be to look into swapping to a ti-trim
Best bang for the buck might be to look into swapping to a ti-trim
Last edited by ysb02; Dec 20, 2016 at 10:43 AM.
Advanced
Joined: Jul 2016
Posts: 67
Likes: 5
From: Hattiesburg Mississippi
Dropping down to 3.4 and adding meth was something else I was looking at. I'm sure the meth will help during the summer in MS. I need to address my fuel system as well. Better too much than not enough.
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 2,728
Likes: 142
From: Iowa
I'd skip the TB (read instances of people going back to stock for FI) since it's a headache for minimum hp gain and maybe just do the heads. The gains from ported heads might be more than N/A, maybe 30-40 rwhp at best? Some of the FAST intakes were suspected to leak under boost but there's plenty of people using them I think. It's generally a lot of money spent for minimum gain.
Best bang for the buck might be to look into swapping to a ti-trim
Best bang for the buck might be to look into swapping to a ti-trim
For example, if I'm running an Si on a 3.4 pulley at 638whp and swap to a T on the same pulley...what will the difference be? How small of a pulley can you run on a T before overspinning? What about a YSI on a 3.4?
I've tried to look up info and ask questions to learn, but it seems like a lost cause. The vendors don't comment or directly answer these types of questions either.
I have quotes and everything from A&A for T and YSI swaps, but I have no idea which would be productive for my goals. They don't comment on it either. If I could swap to a T and get the job done, I would. But there's no information available on any of these blower units to figure that out.
Last edited by Quickshift_C5; Dec 20, 2016 at 12:36 PM.
Racer
Joined: May 2007
Posts: 478
Likes: 58
I'm also looking at T Trim and YSI swaps. The problem is I can't find any information on how they compare. Where does anyone find this information?
For example, if I'm running an Si on a 3.4 pulley at 638whp and swap to a T on the same pulley...what will the difference be? How small of a pulley can you run on a T before overspinning? What about a YSI on a 3.4?
I've tried to look up info and ask questions to learn, but it seems like a lost cause. The vendors don't comment or directly answer these types of questions either.
I have quotes and everything from A&A for T and YSI swaps, but I have no idea which would be productive for my goals. They don't comment on it either. If a I could swap to a at and get the job done, I would. But there's no information available on any of these blower units to figure that out.
For example, if I'm running an Si on a 3.4 pulley at 638whp and swap to a T on the same pulley...what will the difference be? How small of a pulley can you run on a T before overspinning? What about a YSI on a 3.4?
I've tried to look up info and ask questions to learn, but it seems like a lost cause. The vendors don't comment or directly answer these types of questions either.
I have quotes and everything from A&A for T and YSI swaps, but I have no idea which would be productive for my goals. They don't comment on it either. If a I could swap to a at and get the job done, I would. But there's no information available on any of these blower units to figure that out.
Racer
Joined: May 2007
Posts: 478
Likes: 58
40 rwhp N/A engine practically stock is GREAT, so for FI should be even better but of course this was supported with a mild camshaft that it gave me another 50 rwhp..........And I do not spin my RPMs over 6k
Last edited by typeav; Dec 20, 2016 at 12:53 PM.
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 2,728
Likes: 142
From: Iowa
I may say that you started with the wrong head unit? I know for sure that in the world of supercharger PROCHARGER is king. Your goals could have been fulfilled just with a D1SC. About the heads I went from 241 to 243 fully rebuilded and it gives me around 40 rwhp, I do not know exactly if they ported or not, I just drop the heads and all internals new exept the rocker arms.