I have been thinking of taking the TPI manifold off and replacing it with the Victor "spider" type EFI intake manifold. I cannot find an intake elbow which will fit the TPI throttle body. Will or can an LS1 type throttle body be adapted to work with TPI? Where can I find an elbow, which will fit the intake manifold (4150 style carb) come up 90 degrees to the front of the engine and have a plate to fit the TPI throttle body? I was thinking of using the 502 monoblade ram jet throttle body... intakeelbows.com has only ford and ls1 type adapters, but that was exactly what I am looking for. I emailed him for a custom job but he will not do it, the LT1 has the same TB dimensions but there isnt one for it... Assuming I can find all this and it bolts together, what will i have to do with the computer? I think this will out do any thing else i can find - the miniram runs nearly a $1200, the other bolt in HSR and whatever dont really deviate from the TPI style power curves. I may be getting a 91 Z28 L98 which runs MAP. Eventually I want to replace that with the World 454 small block w/ low compression and good flowing heads. The EFI Victor will feed that engine and I want to get the turbo installed and running (infrastructure wise) on the L98 before hand. Any advise? I want a high horse, high RPM demon...!

The 90 degree elbows will require you to use the LS style TB. Edelbrock offers at least 6 different ones. There are no elbows for our twin-blade TBs. There are also elbows for Ford 5.0-style TBs.

You would need something custom. See pic below. I went the route of off the shelve type parts. However, in either case sensors and throttle cable hook up will be somewhat custom. I don't think there is a "kit" out there that is completely bolt in.

How was your power curve altered? I know the low end would loose some power... but I would expect huge gains on the top end. Also, with this, my cam selection is pretty much unlimited... right?

This was in the Accel DFI catalog.



p/n 74882

I could never seem to find it anywhere though.

.doc file is a cut picture of it from the catalog

email aaron at intake elbow. He can make you what ever you want.
http://www.intakeelbows.com/

I agree.

The Accel part is no longer in production, and Aaron will make whatever you want to your spec. He made mine and I'm pretty happy with it.

-- Joe

Here is a 90 degree elbow that is in production and fits the TPI style of throttle body.http://www.nitrousoutlet.com/catalog...el=143&dept=11 I have one although Aarons elbows (intakeelbows.com)are better built.

http://www.860performance.com/catalo...47&section=128

Great, you just found the piece that my buddy needed to swap to the victor jr. intake. I knew he wouldn't be able to leave his new motor alone

Its pretty bad when a miniram is choking your motor huh?

$400

yeah the boosted one isnt cheap at 400 bucks but its a nice looking elbow. I'm debating on swapping my HSR for a vic efi setup just for best air distribution with boost.

You going to put that under a stock hood?

Kinda hard to tell, but doesnt look any taller than a stealth ram

As Atilla mentioned earlier Edelbrock makes them for a lot cheaper than those others. Look here.

Those dont use the TPI /LT1 style throttle body tho. Intakeelbows.com doesnt make them either, i tried. Nitrous Outlet/860 performance are the only two making that one 315 dollar one above for LT1 throttle bodys

Why not run the LSx throttle body than? I think it's an upgrade.

I've run this style on 3 motor builds so far (including the current one) and it works really nice. I drove my vette to work today, and honestly, it's smoother throttle operation than when it had the TPI style throttle body and miniram last summer.

I still want to push the car into the ocean, but that's due to other things. The intake is good

-- Joe

Not everyone wants to have to buy an elbow AND a throttle body.

True, but he could probably buy the elbow (edelbrock) and an LSx throttle body for about the cost of a TPI elbow or less.

-- Joe

well i was gonna use my holley stealth ram and holley 58mm tb but now i'm considering vic efi and elbow and use a stocker 75mm ls1 tb or a cheaper aftermarket 85-90mm. Doesnt matter i think since the motor is boosted, it will be forcing air thru 3" feed pipe so a larger TB doesnt matter.

Thinking i'm gonna do it since i dont wanna spend 400 for a elbow when Aaron at IntakeElbow can do a elbow for 200 +shipping

IAC and TPS is suppose to be the same signal just different wiring connectors, shouldnt be hard to splice in right?

That was my idea.. Get an elbow from Aaron. A 76MM throttle body should be 3", so apple to apple.

If you can get AAron to weld a cable bracket to the elbow do it. I didn't think of it and ended up making one that bolted to one of the carb studs. And while that's not a huge concern, it was another thing to do.


-- Joe

A nice pictorial of the change and before after dyno results would be awesome!

I can get pics of the change but i no longer have the old 383 to compare it to the stealth ram. It will be a boosted 400 motor now so any dyno results will be skewed

But i'll get pics of the setup if i go this way

Bummer, I'd like to see the results compared to an HSR on a 383, however I'm happy for you.

I think you might as well bite the bullet and buy the new Dart block and go 454.

I'm still interested to see a write-up on the splice for the TPS/IAC and see pics of the setup.

Any of these SP manifold + intake elbow setups work with the oem hood? what is the difference in the "boosted" elbows? anyone want to buy an unused miniram(if this setup fits)?

The boosted elbow is welded inside and out where as the non boosted elbow is mostly welded on the outside. The "860 Performance"elbow is the same one sold by"Nitrous Outlet". I'm using a Edelbrock elbow with LS2 throttle body now. I might be interested in selling my "860 Performance" elbow. In addition it has a nitrous spray bar built into it.

I have the edelbrock manifold and low profile elbow, and it will not fit under a stock hood. Its about an inch taller than the HSR, also there isn't enough room for a regular t-stat housing.

My manifold is milled, and my elbow is custom. Fits under the stock C4 hood, which has roughly 1" less clearance than an fbody.

Had I known then what I do now, I'd have gone with this type of setup on the first try. Very clean and neat packaging. The only thing I'd like to do is replace the 90* bend with an aluminum one with a BOV flange to reduce compressor surge.

-- Joe

I'd be very interested if the price is right

Have you tried mounting it so the Tb is on one of the sides? Does it clear the fuel rail? Is that intake the vortec version?

anesthes - do you have a picture of your setup by chance? who made your custom elbow? I agree not only is the setup cleaner and easier to work on but air distribution especially while boosted is far superior. From what I am finding out recently my Miniram (and its fuel rails) are not going to be enough. What kind of HP or TQ increase did you see after your converted to SP?

I have not had a chance to dyno the car.

Aaron from www.intakeelbows.com made it.

-- Joe

very nice. did you have to modify the fuel rail positions at all? mine would have to come passenger side. what kind of manifold did you use and how did you go about milling the manifold? just mill the carb mount down and drill tap the holes?

yes its the super Vic e-tec/vortec manifold. I think the elbow would clear the fuel rails. Im running a procharger and I didn't want to make new pipes to run the TB on the side.

I ran new -6 lines. Feed on the driver side front rail, return on the rear passenger side where the regulator is. The manifold + fuel rails is a holley commander EFI manifold.

Milled the 'carb' pad down a ton, re-tapped the mounting holes. Kept the same bolt pattern for compatibility. The throttle body elbow just clears the fuel rail enough so that the injectors can be swapped. It is about 1/4" above the valve cover, which does require removing the elbow to gain access to the valve cover.. But I needed it to fit under a stock hood.

If the blower didn't make noise, the car would be a sleeper.

-- Joe

9 second 1/4 + oem look = my kinda gal

was a machine shop able to do the mill work for you? does the lsx throttle body utilize the same signals for IAC and TPS? are yall using oem ecms with ls tbs? if so i imaging the dfi wouldnt have a problem with the change.

Here's a pic of my setup just after I got it running (older pic). Its a Vic Jr EFI manifold with a wilson elbow and an accufab TB (ford style 90mm). All barely fits under a stock Iroc hood. I had to mill about .250 - .300 off the bottom of the elbow and roughly .125" off the top. Also, drilled and tapped it for NPT fittings.




Pardon the crappy intake, I'm currently in the process of adding a procharger.

wow very interesting thermostat housing! whered that thing come from?

Probably a blower waterneck for a roots setup. Check out summit, few different styles exist.

-- Joe

I was looking at a few blower waternecks, but the one I ended up using was out of a hot rod catalog called street and performance. I had to modify it as you can see from the pic, but it helped in getting the necessary clearance.

good to know. thanks for the info gentlemen.

now my question is, anyone have a bracket that fits all these wonderful elbows that accept the 700r4 kickdown cable?

im running edelbrocks 3849 elbow and 90mm tb if it matters..

Does anybody know if this particular part # would fit under a Firebird hood? I wouldn't even mind doing a remote thermostat housing if this intake elbow would work well with the single plane manifold.

http://www.summitracing.com/parts/EDL-3851/

That should easily fit, its only 1.25" from flange to TB centerline. Most manifolds are like 5" rise so i think it would fit nicely. Think it would be shorter than the stealth ram and it barely clears on some firebirds

My only concern would be the power limitations. I believe a lot of those edelbrock boxes are rated at 400hp.

-- Joe

Thanks for the confirmation.

Thanks for highlighting the power limitations. I am just looking for a good intake that fits under the stock Firebird hood without cutting. I like the HSR but don't want to cut my hood. I like the single plane as well...if I could just find the correct intake elbow I would be in business with the single plane intake. Miniram is just too expensive but if I had to add in the cost of getting a new hood to keep from cutting my stock hood...the miniram becomes reasonable.

Want to fully explore the use of using a single plane. I had somebody offer to mill the HSR for cheap to make it fit....but am not to sure about that.

IF you go with singleplane, there is always intakeelbows.com that will make a custom elbow for 225. Custom to your specs, you tell them what you need.

Combine a lowrise elbow on a victor EFI sp manifold, and a short waterneck and you can get it to clear. That one guy on corvetteforum has a very nice singleplane setup that fits under C4 hoods so it will clear thirdgen

I will have to go check his setup out. Do you know his name on the CF?
Thanks

He posted it here too, you may have seen it. I believe it was AKS_Racing or it may be all one word

See this post
http://www.thirdgen.org/techboard/al...stroker-2.html (Best system for 383 stroker???)

GREAT looking singleplane setup

IIRC, the Edelbrock 400hp rating, is not max HP but was the power level where the power curves started separating out for the low profile vs high profile/max flow elbows. They both make power above 400hp, but at less of a cost with the high profile ones.