cobrakiller1989

iTrader: (1)

CAN SOMEONE PLEASE GIVE NE THE PART NUMBER TO THE EDELBROCK TPI MANIFOLD AND A PRICE ALONG WITH WHERE THEY GOT IT. For some reason I cant find it anywhere.
Thanks alot

Kevin91Z

iTrader: (1)

Its 3860, and you can get it at Summit, Jegs, etc.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

99MONGOOSE

I did some research awhile ago and now you need it, here it is:
base/runner combo #3890 1985-1988 $649.95
base/runner combo #3891 1989-1992 $659.95
base/runner combo with aftermarket heads-
---#3892 1985-1988 $659.95
---#3893 1989-1992 $659.95
base only #3860 1985-1992 $356.95
base only #3861 1985-1992 aftermarket heads-
---$356.95
runners only #3865 1985-1988 $302.95
runners only #3870 1989-1992 $317.95
Part numbers were right from Edelbrock Corp. and I got prices from Summit Racing's Website 5 minutes ago so they should current.
Good luck, glad to be of help!!!


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1999 Camaro SS LS1 m6
1987 Iroc-Z 5.7 TPI
1984 Camaro

cobrakiller1989

iTrader: (1)

thanks for the replies guys.
How come there is a different manifold for aftermarket heads when they have the same bolt pattern. Does the one for the aftermarket heads flow better or something?
thanks again

blowen90ta

check out www.carpartsonsale got mine there for 315.00 less than one month ago.
pete

99MONGOOSE

I think some heads have a different angle in which the bolts toward the front of the intake mount. I remember some time ago someone talking about having to elongate the holes in the intake for this problem. I want to say maybe with the ZZ4 heads but not sure.

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1999 Camaro SS LS1 m6
1987 Iroc-Z 5.7 TPI
1984 Camaro

Kevin91Z

iTrader: (1)

The 3861 is the one for Corvette heads and those with the same bolt-pattern. But the 3860 has both bolt patterns so I dunno why they have both.

cobrakiller1989

iTrader: (1)

Kevin,
I do have after market heads. I am not sure on the bolt pattern, i know that they are center bolt. Currently I have a TBI performer manifold, so would I want the one for stock heads or aftermarket heads? thanks alot

Kevin91Z

iTrader: (1)

Which aftermarket heads? Just get the 3860, it has both holes for both bolt patterns.

cobrakiller1989

iTrader: (1)

im not 100% sure because my uncle built the engine for me, but i know that they are world products heads with 2.02, 1.60 valves. I dont know if you call it decking or shaving, but that has also been done to make sure they are perfectly flat on the bottom. sorry i dont know alot about it all. Ive only been really into engine stuff for like 8 months or so. thanks for your help.

KNBlazer

Didn't want to start a new thread, so here it goes...

What exactly is the difference between 3890 and 3891? I thought 85-92 used the same heads and bolt patterns... or is it that 3890 has the cold start injector hole and the 3891 doesn't... I need something that I will be able later on, say a few years bolt on an 87-92 350 with Trick Flow heads...but from what I can see the heads come with center bolt engines... ok I think I have confused myself beyond repair.. ... someone clear the path..

Ok at this point I think it's the runners that change the part number of the combo, am I right? but why, are mounting holes different for different year plenums?

Gregzz4

Isn't there a stamp of some kind near the springs ?
Pull the valve covers off and look for casting/stamped #'s

KNBlazer

Dude, you know he posted that like ummm... NINE YEARS AGO, lol...

Gregzz4

OMG, why'd you just not start a new thread !!!!
I didn't even look

KNBlazer

hehehehehhehe,,,,,,,,

nickynick17

Does this setup make a difference? Does it still have the same problem like the OEM TPI with no power after 4000 RPMs

Damon

Aftermarket heads...... what if you're running an 89-92 TPI setup (no 9th injector) but using aftermarket heads with the older 86-down intake bolt pattern? You would need something that would work with that combo that never existed in a factory engine- late model runners but old bolt patern heads. And since the break-point between early and later intake bolt pattern heads happened in 87 you end up with 4 possible combinations of runners (9th injector vs. no 9th injector) and intake bolt pattern (early vs. 87-up).

Admittedly, the way Edelbrock describes the kits on their website is way out in the weeds, but there ARE four different combinations possible and they address all four in their offerings.

If it was me, I'd call Edelbrock directly and talk it through with them before you order.

BTW- welcome back after a 9 year absence!

IROCKMY90IROC

Bump

IROCKMY90IROC

Can anyone confirm or deny this statement?

Tuned Performance

iTrader: (92)

Super old thread , yes the 3860 has 72 & 90 degree center pattern. There’s on on eBay right now


https://www.ebay.com/itm/20437974933...mis&media=COPY