i ended up putting my money on fid. among the equal length tubular mani's, they've got the best and most realistic dyno data to date (some loss in spool but great gains). build quality looks as good or better than anything out there for similar price. with that said, i'm tempted to buy a toxicfab to find out if an equal length tubular mani really can produce significant gains with no loss in spool as suggested by the dyno data. i suppose i can just wait for someone else to test it.

Edit: The dyno plot on the ToxicFab manifold is back up, and there is some loss in spool as to be expected. Strange looking dyno plot for a stock 9 turbo though.

 

i think someone on here did a comparison between few ported stock manis from different companies. as far as i can remember, MAP was the best one.

 

Can you measure the diameter of the FID runners?

 

Yes, supposedly MAP had very good gains on their ported manifolds. So an independent dyno test comparison was made between our FiD tubular stock manifold vs MAP ported stock manifold and we still managed to gain even more power over the ported manifold. You can expect much bigger gains swapping out your unported stock manifold and running our tubular setup.

https://www.evolutionm.net/forums/ev...-manifold.html

MrC

 

will do when i receive it, but i suspect that MrC will beat me to it.

can't wait to find out for myself.

 

Thanks for your order...you will not be dissappointed. Keep in mind when comparison our manifold vs the competitor you mentioned:

-Our manifold has been independent dyno-proven gains, not some dyno #s from a non existent dyno session.
-All of our head flanges and turbine flanges used in the construction of our manifolds are cnc from 304SS stock vs our competitor's mild steel head flanges. That's a big difference in material cost and fabrication cost for stainless over mild steel cnc flanges. Our manifolds are 100% 304SS so you don't have to worry about your flanges rusting and seizing the nuts and bolts along with it, after only a few month of use. So you're getting a lot more for what you're paying.

MrC

 

The runners are 1.42" ID (1.25" schedule 10) for our FiD stock tubular manifold. We only use 1.5" on our v-band, t3 undivided to flow 600whp+ turbos for top-end power: https://www.evolutionm.net/forums/ve...turbo-kit.html

There's no justification for using 1.5" on the factory twin scroll manifold, plus using the smaller runner would allow for a more ideal runner layout with a narrow angle merge collectors and gentle bends, due to the slightly smaller runner diameter.

MrC

 

Here's a few more pics of the back-side of the production manifold:

This manifold belongs to mrfred with the optional SS npt egt bung per customer spec:





MrC

 

alot of nice stockies on the market so thats the cool part

 

check out fortune autos new stock replacement mani

 

So many choices. I think Shearer is possibly making a FF stackframe turbo setup.

 

Why would you lose spool for a tubular mani?

 

1) runners are longer than the stocker thus ex. velocity decreases.
2) cast manifolds retain heat better than tubulars do.

these are 2 things i could think off the top of my head.

 

Thanks for the quick reply

 

Ok I sat down and read this thread for about 20 mintues. lol. Right now I have full bolt ons and I am getting the new HKS GT2 kit that just came out very soon. After reading I am leaning to the full race header. And I will have my stocker ported as a backup.