Ok, I need to buy a new intake manifold (lower section) and I found someone selling one off of a 85/ or an 86 IROC (he's not sure which year it specifically is of the two..) is it the same manifold that is on my 87 GTA ? just wondering if it will work....also, does anyone know where I can find a new manifold for fairly cheap, be it aftermarket or OE. the junkyards have let me down so far. thanks
-Ben

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87 5.7 gta - UsBody Src Ram Air II hood, all the ghetto mods, cam, 1.6 roller rockers, chip, exhaust, functional ram air, blah blah, all that stuff. best et: 13.64 @ 104.38mph r/t .601
my baby

 

I'm sure someone will correct me if I'm wrong, but I think it was the '88 and up manifolds that had different mounting angles for the center 4 bolts that attach to the heads. So an '85 or '86 should work.
Then there's the issue of the "9th" injector. I have an '89 so I don't need to deal with it, but I don't know what year they stopped using it.

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Pat McGrath '89 Formula LB9, T-5

 

'87 was the first year for the new intake bolt pattern. You can get a drill and make an earlier intake work, but it ain't pretty.

Panthro is right about the 9th injector, you may have to block it off if you find a later model OE intake and you will have to block it w/ an aftermarket intake.



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Dan
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87 IROC-Z, 5.7,auto, 3.27, leather, !cat, Holley fpr, K&N'S, SLP 1-3/4" Jet-Hot coated headers, Accel .219 cam, Comp 1.5 roller tip rockers, $uperPITAram, Edelbrock lower intake, Holley 52mm tb, Dynomax\Flowmaster catback. Coming Soon- DFI or prom burner, Dart Iron Eagle 200cc heads, 6" rod 383 or a 406

1987 Camaro Z28 - 5.2tpi, auto, 3.73s, tb airfoil, ported plenum, !cat, !tbcoolant, !smog, !4th gear :/

1989 Pontiac 20th Anniversary Turbo Trans Am - 161,000 miles, !cat, 9" K&N - SOLD

 

No, the 85-86 manifold is different than your 87. You need one from an 87-92 TPI car. Or a better solution, but more expensive, is an aftermarket intake manifold from Edelbrock, TPIS, or Accel.


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Ben I just swapped out my 88 GTA’s stock base intake manifold last weekend. If you want maybe you and I can make a deal for it. The only thing is I live in Hawaii so shipping may be a little expensive. Send me an email if you are interested.

 

You might have to have a special chip burned if you eliminate the 9th injector. I unplugged mine to see what it would do, and it WOULD NOT START. I THIINK, 87 & 88 are the same intake since they both used the same heads from 87-92 on 305s, and I Think the 89 was the first year to eliminate the cold start injector.
I happen to have an extra 89 TPI intake.



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87 Formula 5.1 converted to TPI Yellow/Black
SLP cam, headers, cat-back exhaust
Ported & polished TPI intake
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
Hotchiss strut tower brace
South side machine frame connecters
Custom reinforced control arms and pan hard bar.
Custom Leather interior

87 Formula TPI (5 Speed) Yellow/Gray STOCK

83 Camaro (Parts)
83 T/A (parts)

www.3rdgenformula.com

 

About those aftermarket manifolds.. anyone have any links to their info/pn/prices? I have some extra cash from graduation, and am maybe in the market from one since it has to be replaced anyways.... and, no, I can't afford a mini/super/tunnel ram setup; didn't get THAT much $$ from grad. thanks
Ben

 

Ok, did a little hunting around on the web.. anyone have the CFM comparison of a ported stock manifold vs. the Superram High flow manifold.. just wondering if the 380 bucks it costs is worth it... (puts a pretty large dent in the blower fund)
thx
ben

 

for 380 bucks buy it that's a steal at that price jegs and summit want 500+ for it i paid 356 for myh edelbrock i also have 3 tpi manifolds an 87 305,87 350,and an 89 corvette intake.

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87 trans am 350 L98 aluminum heads,LT4 hot cam,slp runners,headers,y-pipe,edelbrock base,hi flo cat,air foil,ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt,ads strip chip,relocated iat sensor,hollowed maf

14.10@97mph w/2.01 60' 4SALE anyone want her?