ITB's on a 24v project, Dyno results Post 136!!!

[amcink]

So how much are these and what is the HP gain (I cannot see graph)

[ForcedFirebird]

Short video.

[ForcedFirebird]

Wait...are these ready to purchase now? S52 guy here, standing by!!!!

Yes, they are available.

could be wrong but i thought that S52 graph was a custom tune vs off the shelf aftermarket tune and nothing to do with ITB at all.....

Correct. It's stated just above the link that it's an OBD1 manifold. The client just bought a supercharger kit and am trying to talk him into using his car for a trip to the dyno with ITB's.

That doesn't seem like much of a gain. My bone stock S52, dual mass flywheel and all in my E30 did 231whp/225tq on a TRM chip.

Peak numbers don't mean much. That graph is a TRM chip vs my live tune. And to say "not much gain" when the peak torque went up 41 at the wheel and the hp also increased 40whp@5300 RPM from software alone, I think that's rather impressive. I still don't get why people look at only the peak numbers. This car was night and day difference, specially seeing the 40whp gain was right where the RPM's are after a shift.

Wow, never saw this thread! Nice worm John. Let's see these on a S50/S52! 8)

Thanks man. Been a long time coming. Trying to talk the company into making an m20 adapter as well. The casting quality is phenomenal. The whole kit with linkage weighs 11lb. We are putting the Extrudabody ITB's on another customers' m20, and to be quite frank, the Rowland castings have a lot to be desired, in weight, quality and port shape.

[MR 325]

Wow, never saw this thread! Nice worm John. Let's see these on a S50/S52! 8)

[digger]

That doesn't seem like much of a gain. My bone stock S52, dual mass flywheel and all in my E30 did 231whp/225tq on a TRM chip.

could be wrong but i thought that S52 graph was a custom tune vs off the shelf aftermarket tune and nothing to do with ITB at all.....

[JCarp90]

That doesn't seem like much of a gain. My bone stock S52, dual mass flywheel and all in my E30 did 231whp/225tq on a TRM chip.

[kingston]

YES!

Tuned an s52 Sunbelt cammed, 10.5:1 with headers and OBD1 manifold a couple weeks ago. He made 240+whp, and it really choked up top. Don't want people to mistake the graph in this thread, so will just post a link. Live tune vs mail order. You know as well as I do, the peak didn't change much, but this same car was a different experience before/after.

http://i448.photobucket.com/albums/q...psae2f6ab5.jpg

Wait...are these ready to purchase now? S52 guy here, standing by!!!!

[ForcedFirebird]

thats a good result. the more you do the more the tune helps. i gave up on off the shelf chips about 8 years ago, custom FTW.

how is the driveability of the ITB M50? mine now is excellent even with lairy cam. ITB all the way

The drive to the dyno wasn't so pleasant according to AFR's and some hiccups, the drive home was awesome. Did a rolling road at the dyno to tune the part throttle. So much better when you have AFR/RPM logging and can go 100mph standing still lol. Drive-ability on the street was already sorted to "feel good", not stumble and bog, but transients, tip-in etc were much better after.

The stock IAC is in place, and since the stock ECU (albeit Alpha-N) is being used, it drive much like stock except the power is on tap, and it feels like a low boost turbo above 4k, pulls solid to rev limit. Of course, I am biased for the "butt dyno"

[digger]

YES!

Tuned an s52 Sunbelt cammed, 10.5:1 with headers and OBD1 manifold a couple weeks ago. He made 240+whp, and it really choked up top. Don't want people to mistake the graph in this thread, so will just post a link. Live tune vs mail order. You know as well as I do, the peak didn't change much, but this same car was a different experience before/after.

http://i448.photobucket.com/albums/q...psae2f6ab5.jpg

thats a good result. the more you do the more the tune helps. i gave up on off the shelf chips about 8 years ago, custom FTW.

how is the driveability of the ITB M50b25? mine now is excellent even with lairy cam. ITB all the way

[digger]

Open trumpets today.

might be 5hp more with one from what i found and experience from others and a properly sized K&N doesnt hurt flow

[ForcedFirebird]

when are the bolton and cammed S52 guys gonna get this up and running?

YES!

Tuned an s52 Sunbelt cammed, 10.5:1 with headers and OBD1 manifold a couple weeks ago. He made 240+whp, and it really choked up top. Don't want people to mistake the graph in this thread, so will just post a link. Live tune vs mail order. You know as well as I do, the peak didn't change much, but this same car was a different experience before/after.

http://i448.photobucket.com/albums/qq202/Forced_Firebird/Random%20crap/20140516_174100_zpsae2f6ab5.jpg

[e30austin]

My old 300k+ 100% stock M50TU made 175hp and 160tq on a dynojet.

[ForcedFirebird]

what airbox/filter you using?

Open trumpets today.

[digger]

when are the bolton and cammed S52 guys gonna get this up and running?

[digger]

Still made 177whp lol. I searched and searched posted dynographs. Seems a cammed, healthy m50b25 is about the same as these ITB's.

yeah peak gains will be there on a free flowing head but overlay the curves....

what airbox/filter you using?