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We are having to replace O-rings for our molds during every service to prevent failure from O-ring compression set. We currently use 100 series Viton O-rings encapsulated in a .073" deep bore, for our static seal waterlines. General mold temps are around 320-350F. Each mold currently has...

Another recommendation for the free Google Sketchup. As long as you aren't looking to detail things, this should be good enough, and you can't beat the price of free. If you are looking to get serious, I am a Solidworks man.

Why is the manifold divided anyway? I would make my own out of a 3" (or whatever the size would be) SS heavy wall tube bend. You can crush it to fit the square-ish sides of the port. I would think this would offer a performance increase as well, then just get it coated. Just draw up your...

12-12.5 A/F

A farming expression meaning "A decent return for little effort". Low hanging fruit is much easier to pick compared to the ones at the top of the tree.

You have 2 problems with your setup according to the info provided. 1. (as mentioned above) You need a CAI to reduce the inlet temps down closer to ambient. 200F is too hot to begin with and is really hurting power. This alone might bring you into "the zone" for little $ and effort invested...

I cannot even begin to imagine how you are going to fit all of your "plans" into any engine bay that would fit your V6. Just fitting the turbo plumbing including EWG(s) is going to difficult. V6s aren't easy to turbo with a big single to begin with because of the difficulty in merging the 2...

It is probably PP he is working with. That material is notorious in IBM for this problem.

The crossover tube is mainly to equalize pressure between the 2 sides. I doubt that this is absolutely necessary, but many do it just to be safe. If there are other reasons, I do not know of them. I have dual manifolds on my Subaru and I have (in effect) very small crossover tubes to connect...

Sounds like a sequential twin turbo setup? Couldn't you fit a small IC to cool the charge before the turbo inlet? Reducing the inlet temp will give great results in efficency.

Forgot to add, and at least 1 turn of thread.

You need the SPI 28MM - SP-400 - specs. Basically "T" 1.078 +- .010 (thread DIA) "E" .984 +- .010 (Neck DIA) "S" .046 +- .015 (Start of thread from bottle face) "H" .400 +- .015 (dim from face of neck to bead or shoulder, measured paralell to thread) .167 Pitch 45deg top thread face...

Regular Buna O-rings are probably your best best for cost and for sealing. I just designed a set of ITBs with them throughout and they work with just hand tightning the bolts and are quite reusable. They can also fit most shapes (don't just have to be round grooves) as mine are Oval ports...

The check valves pretty much eliminate any need for restrictors (they are substituted) and should always make more vac at idle compared to them.

I still think that injecting cool fuel is always better than hot fuel with respect to a FI engine. Getting more HP is much easier if you are not detonation limitted and cooler fuel has to contribute something to this theory. Considering that cooling fuel before injecting is almost a "free"...

I just solved what I thought was (is) a concern when trying to tune individual throttle body setups with only a MAP / Speed Density ECU with no alpha N. ITBs setups have notoriously been difficult to tune this way due to very low vacuum levels at idle and above. This greatly reduces the...

I have seen multiple applications that have cooled after the injectors (which makes no sense to me at all). Why would you not cool before injecting? The fuel will just be heated up again once it is pumped. This is like intercooling your exhaust to me.

Thanks for the detailed post.

If only I had a nickel for every time someone posted "please use the search" function on this forum, and then not provided any real information to the original question. I have done multiple searches but "fuel" and "cooler" tend to return many unwanted results. Does anybody have a link to this...

I know that some drag teams run fuel coolers to cool their fuel to sub ambient temps prior to runs and get a HP gain out of this. I am building an all-out effort turbo 4-cyl. My questions are these: What is the average temperature increase on fuel in an EFI engine running around...