I have a 1991 RS and plan on droping in a 350 with AFR heads.Which TBI/intake manifold would go best to give me the most power. thanx

 

legally in CA there is 1 intake you can get. Other wise I'd get http://www.holley.com/HiOctn/ProdLin...AMSM/7547.html (which I did get )



or a Edelrbock Victor Jr.
http://www.edelbrock.com/automotive/man_sbchev.html


------------------
-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

[This message has been edited by Tas (edited November 29, 2001).]

 

well that intake says for carberated models. i pretty much need an intake system that would allow me to get to my 400HP mark. Can i do that with TBI? IF so which TBI should i get and what manifold would go good with it.

 

iam getting a cowl hood so clearance shoudl not matter if is a problem.

 

victor jr single plane intake
holley 670cfm TB unit with large injectors and a custom eprom
Definatly go with a sigle plane intake.
The new intakes show like a 5-10 ft-lb loss in torque until a certain point, but the extra 10hp is noticable!

------------------
, Jon (350 TBI!)
91 Red My website

 

you think a 350 with AFR heads, good cam, Victor Jr manifold, holley 670(with bigger injectors), and a custom chip wold let me run 12's with tha right suspension. and is it worth it to move to a Super ram/mini ram intake?

 

also does the holley TBI come with bigger injectors or do you have to buy them seperatly. if so where agood place?

 

Performer RPM Air Gap manifold, custom TBI spacer, OEM GM 454 TBI unit (not Holley's!) and GMPP Hot Cam can get you to 400hp.

I got CARBED 400hp with Fast Burn heads, ZZ4 cam with 1.6/1.5 GMPP roller rockers, good (not great) exhaust, carb and AirGap. TBI to com, soon, hopefully in time for the NJ get together. But, I need to get a 454 TBI to do it!!!!!!!!!!

 

Add a single plane intake and it gives you 10 more hp with no noticable effects on low end grunt! If you go with a carb they've been able to push 422hp out of the victor jr, vortec 330ho motor, lt4 hot cam combo. Only 412hp with the dual plane.

------------------
, Jon (350 TBI!)
91 Red My website

 

I'll take 10 more lb-ft of torque across the entire low-end with the dual-plane... 10 more PEAK lb-ft (or PEAK 10hp) up top doesn't do much good in a street driver, never mind the drivability issues. And you won't FEEL 10hp... overall Torque is what moves the car, not top-end hp... Just my opinion from experience. 10 for 10.

I will agree, SP makes more PEAK and top-end power, but from all my days of racing, the street driven car with the dual plane manifold will win more street races and just as many strip races, if the driver knows how to drive and the car/chassis is set up properly...

Ie, take your engine in both SP and DP forms and put them in identical cars... The DP will have more botom end torque to hook-up/leave better with but the SP guy has a bit more top-end torque to catch you at the traps. Both cars have certain advantages and USUALLY the DP engine has more area under the torque curve than the SP car. USUALLY, that is.

All I can say is I say this from lots of experience, and I would not believe one magazine article that may or may not have a hidden agenda to be very accurate... Build your engine and check what you see. I typically get much more low-end from a DP manifold than a single planer... That is why torque curves in those magazine test articles start at like 3600rpm and go up, to mask the bottom-end torque/hp losses/changes... Same thing holds true in catalogs. Low-end combos taunt low rpm torque but the RPM-type package curves don't even graph until about 1500rpm higher, for a reason...

And what about below 3600rpm??? ie Where you launch and drive almost 99% of the time on the street??? You want/need as much tq as you can get!!!!!!! I don't drive above 3grand unless fear is in the air... I don't know about you guys. Then again, I am 36...

EDIT: JP, can you give me a link to the Vortec 330 intake/cam swap test(s) you discuss, ie 412hp vs 422hp??? A scan? a table of the dyno data??? BTW, you cannot run the Hot cam (even woth 1.5's) on OEM vortec heads... Must be moderately massaged and/or ported as well???

To wit, with bigger cam/head/high-rpm flow combinations, the smaller the low-end torque loss will be, as there is less to loose and the engine does NOT run well there so changes in intake/runner size/etc, have minimal effect. MORE effect seen on mellower motors, like 220deg or less duration at .050" lift in a 350cid.

[This message has been edited by fast_broker (edited November 29, 2001).]

 

Well i wanna use my old EGR stuf so which intake(Victor Jr or Performer RPM) will it work with. also will the 454 TBI work with thoe intakes or do i need an adapter.

 

If you want EGR this you're 3 best choices are:

http://www.holley.com/HiOctn/ProdLin...AMSM/7525.html


and

http://www.holley.com/HiOctn/ProdLin...M/f300-64.html


and

http://www.holley.com/HiOctn/ProdLin...SM/300-66.html


For the Carb intakes you do need an adapter that go for about $40. If you want the TBI in the center of the intake then get one from www.turbocity.com The bottom 2 intakes are the same except that the top one is machined for a carburator and the bottom one is machined for a TBI. I don't like that the TBI not in the middle of the intake, but what do I know. If you don't care where the TBI is then get the TBI specific intake so you don't need to buy an adapter.

------------------
-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

[This message has been edited by Tas (edited November 29, 2001).]

[This message has been edited by Tas (edited November 29, 2001).]

 

so those are the only intakes that myEGR stuff will work on? Are they that much worse then the victor jr or PErformer RPM. also will the OEM GM 454 TBI unit work on it?

 

Check out the new thread I started. Do you really think I would make up this information? Everybody knows I don't give information unless I'm 100% sure about the correctness. If I don't know, I usually post info that would point them in the right direction. Sorry, you just came off as an ******* with the overused number of question marks.
I also knew you need to get the heads worked to accept the larger lift. lol, you're gonna love this article I just scanned.

 

Thanks, the dyno data is just as I explained.

 

Fear is in the air when you come over a little rise at 130plus and there sets a state trooper!!!!!!LOL Then again, I am 48...

Maybe I need to trade that Performer in for the RPM version before I install it this weekend.?!

------------------
91 RS 5.0 TBI....LT4 cam....Edelbrock headers....3"Dynomax exhaust....5spd.... 3.08.....Ultimate tbi....afpr...ZR 255-50's...Koni's

[This message has been edited by DM91RS (edited November 30, 2001).]

 

I'm with you, DM... Been there, done that! A performer is enough for most causes...