this is going into a 92Z with a 700R4, and 3.73 or 4.10 gears (probably 3.73's)...we're talking a limited usage street/strip setup (19K miles over 10 years in august give you an idea? no rain, no snow, no nasty weather)
now here's the big question (no flames)

miniram vs. superram - I think I want to go
with the mini-ram 2 (larger displacement? right?)

what size injectors? (I want to add in a 150 shot plate NOS system)

what sorta cam?

prom, accel dfi, speedpro dfi?

what size heads? (afr 190's or 210's)

10 or 10.5 compression gonna be a problem?

anyone out there have a setup like this? only seen one 421 in an 85 vette at a show...guy was running a superram and 11.20 or so all engine...figured a bottle would put me into the mid 10's..

 

How fast do you want to go?

Check this guy's set-up out, and duplicate what he did:

http://phil.tobin.net/Hoover/

 

IMHO Sounds to me like you are going to ruin a 91 Z with very LOW MILES!

 

lol, not what I wanted to hear...yeah its low miles but put it in perspective a LB9, 700R4 and a 2.73 rear....its kinda embarassing to hit the gas...my 2000 tahoe with a police package, intake, maf sensor, throttle body, plugs/wires, headers and catback is just as fast (ran my old man with me in the truck, him driving the camaro, both in drive...neither car pulled to 60)

we've had the car since new (10 years end of august)...I plan on pulling the original stuff and storing it all...and buying replacements for the drivetrain, swapping the accessories etc...and always have the possibility of turning it back to stock..

 

If you want to be putting that kind of power in your car get some Frame connectors (WELD them IN) EVEN if you have a hard Top. It will keep you from pretzalitizing <(I just made that word up) your car.

I am planning on eventually installing ONLY a 383 in mine, and I bought a set of Baer Brakes & frame connectors, (worth every dime in stopping and handling power.)


Just a side Note, That Hoover guy, I looked at his time slips he had posted, and well, I hate to tell him this but since they were on the same day, I have to ask, Why do they have different car numbers? One is 50 & the other is 57, I think he has a wrong time slip.

John

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87 Formula Yellow/Black
Engine & Transmission
.040 over 5.0 converted to TPI, 9.5:1 Compression, SLP Cam Dur 206/212, Lift 480/487, Cent Line 112, SLP headers, SLP cat-back exhaust, K&N Airfilter, Modified Stock cold air intake, Ported & polished Stock TPI intake, Holley Adjustable Fuel Press regulator, AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit, Aluminum Driveshaft, 3.73 Posi gear
Suspension & Brakes:
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Hotchkis strut tower brace, South side machine frame connectors, Custom reinforced control arms and pan hard bar.
Interior:
Custom Leather interior, CUSTOM Yellow Gauge Faces, Kenwood Receiver, Pioneer Speakers, Kicker Substations, Kenwood 10 Disk Changer, Pioneer Amp.

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

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

http://www.3rdgenformula.com

 

depends on how much track time it'll see.if you're gonna go once a month or mostly fucc with people on the street go with a ported superram it'll make more tourqe and we all know tourqe is what gets the car moving so streetlite to streetlite it'll be king,as far as a cam goes you can go with the lt4 hot cam 218-228 525/525 or i'vee heard the zz409 cam from tpis runs well too!

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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' LOOKING TO TRADE?ANYONE

 

I don't think a 420 with 3.73s needs to worry about torque. In fact, getting traction will be a major problem.

I would recommend not quite so steep of gears but a higher stall TC instead. Also, a big engine like that can use a fair amount of duration on the cam. What is wild on a 350 might be a little mild on a 420.

 

ah!yes the long stroke is gonna make tourqe no matter what i agree however with a miniram type manifold you'll need a high stall to get it into the power band sooner which is why i asked what kind of track time it will see by going with the superram it will enable him to run a bit less of converter(and gear for that matter)which leads me to believe it would be friendlier on the street.dont think about all out performance if it's your daily driver."pick the fights you can win not the ones that need fighting"

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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' LOOKING TO TRADE?ANYONE

 

the other thing is i've seen not to long ago lingenfelter made a 427 ls1(i know it's a totally different aanimal than a tpi engine but the same laws apply)he made this thing with a special block from the c5r race project specced out at 427.3cu.in. made a special intake for it two seperate plenums and tb's with a long runner design i think they were about 16in. long this engine pulled from idle to 5800(a good range for street and limited track use)it made somewhere around 558hp and 550lb.ft. of tourqe so even on a big engine a long runner type manifold will still make the power you want and give you the comfort of running less gear and lower stall than a rev motor

------------------
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' LOOKING TO TRADE?ANYONE

 

very far from a daily driver, more a weekend or cruise night car. I was thinking of a 2800-3000 stall, and 3.73 gears, kinda wild, but still streetable from what I'd figure. economy and all that crap wouldn't matter at all...I drive a tahoe as a daily driver, I'm use to 12 mpg...

Steve

 

And don't forget suspension mods...you are going to need it to make that bad boy hook up. Have you upgraded your tranny (yet)?

BTW, if you haven't looked into it yet, you should scope out the DIY Prom Burning Board. For the money that TPIS will want to rape you for an eprom, you can easily make your own. SD can be modified for the displacement of the engine, so you have no worries of maxing out the sensors. With large engines, SD is really the only viable alternative.

 

well I'm buying an accel dfi as part of that engine deal....and included is a B&M built 700r4....which will be sent out to a tranny shop, gone over and built to have the snot beaten out of it (would rather do this once)...just need the software and a laptop for that dfi stuff...then to add to all of this a 150 shot nos plate comes with the deal....only suspension I'm getting in the deal is gta springs (have my z28 springs in now) hotchkis LCA's and tokico gas adjust shocks...I think I'm gonna spend some quality time on the phone with steve spohn though. Still want a suspension that can handle...don't want to go all out with a drag setup....maybe a right rear airbag would help though.

Steve

 

Before you toss out the SD system, you may wish to read some of the archives on the DFI vs SD. DFI definitely has its place on BIG HP motors, but you are now talking expensive replacement parts. With SD, you can pick up a spare ECM at any wrecking yard from a 3.1 Cavalier (and a variety of other 3.1 V6 GM cars).

Just a thought that may save you a few bucks and get you just as good results. In fact better, if you consider that there is a lot of expertise on SD systems on the DIY PROM board, but limited info on DFI. For that, you are pretty much on your own.

 

AFR 210 heads
Mini Ram intake
10.5:1 compression
call comp cams and have a cam ground
58mm TB
36# or #42 injectors
long tube headers
vigilante #6 pump (3200-3600 stall)

have fun!
With that combo you can kill on the street and cruise on Saturday night with ease. On pump gas.

good luck

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-86 IROC
S-Trim, Speed Pro, AFR
this years goal: 10.50 @ 130+ mph
-=ICON Motorsports=-

 

safe to say low 11's and mid 10's with a 150 shot? have a certain friend with a blown mustang I have my sights set on.

Steve

 

Fast Only Rolling Downhill if my car weighed 600 lbs. less it would have been a low 14 second car from the factory too

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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' LOOKING TO TRADE?ANYONE