I know someone has made this kind of power with a small block. I want to make around 450+ horses in a small block. Which size is the best engine 400, 377, 383? I think I can build my own to do that but I would rather know for sure. Any suggestions n/a only and try to stay at no higher that 10:1 cr.
Thanks,
Bryan

 

My last motor was close. Was a 383 (more cubic inches will make it easier= less cam, etc) w/ 10.3 to 1 compression. The key is to make sure everything will work together well. Heads are most important. I used Edlebrock RPM's, but new motor is getting AFR 195's. As for induction, either need totally ported tpi, superram, or miniram. Also don't forget exhaust- probably 1 3/4" headers.

Matt

 

Also, 1 more thing- tuning of computer is critical as well. If you can run your car on a dyno and get a chip burned there; that is the way to go.

 

Well, I hope to get @ 420 HP from my new combo: AFR 190 heads, SuperRam, LPE 219 cam, and I have a full exhaust, etc. already. I've seen a couple TPI Vette's running this setup w/ timeslips and dyno runs to prove the HP figures. If you want more HP and don't mind losing the low-end torque/streetablity, I'd get a miniram, AFR 195's, and a big cam that is good from 5000-7000 rpm and you will be making some MAJOR HP (definitely over 450), just make sure the engine can spin to 7000 reliably. That's if you want to keep EFI, if you go carb I'm sure there are a lot of options for you. Oh, and Matt383 is right about the chip.

[This message has been edited by BuckeyeROC (edited July 13, 2001).]

 

http://golensengineservice.com/engin...etype=1&app=hp There are a few 400+ Small blocks here.

 

Wait a few more weeks and my motor will be installed and tuned on the dyno by then. Here is my setup:

GM 4 bolt block
Scat 383 crank and 5.7" rods
TRW pistons ~10.8:1 cr
Comp Cams mechanical roller 242/248 112 ls
Brodix -10X heads flow 295@.500" and 306@.600"
Crower rockers, pushrods etc...
Miniram
30# SVO injectors
AS&M 58mm TB
Yank Super Thruster 3500 stall converter

The heads flow enough for 500 hp maybe more, we'll see.

------------------
87 IROC-Z 305 TPI gears, exhaust, converter
14.70 at 94.1 mph
Solid Roller Minirammed 377 waiting to be installed

 

406 Block
226/230 Cam
AFR 195's
Mini Ram
1 3/4 headers
4 inch exhaust

should put out over 400hp at the wheels with an automatic and the right tuning.Speed costs,how much money you got

------------------
1990 Trans Am GTA,Black/Black Leather,350,auto 3.23,Dual Cats,
SLP Package,Fastchip,GSC's,Brand New Trans with Corvette 2400 stall,Servo/Shift Kit
G-tech 1/4mile(before trans and roasting 1st)13.6@104,now probably 13.2@track with traction/good conditions
stock(track)14.3@96
member www.transamgta.com
Previous Thirdgen
1986 Camaro IROC-Z

 

I don't think the money would be a big problem, time is more of a concern. It will take a year to do all of the work I want to do to it. Should I go with an automatic or 6-speed? I kinda wanna be able to take it out on the road every once in a while like once every two weeks or so. Is a 400 the best way to go? should I stay with fuel injection?

 

What are you planning on istalling it in?Transmission choice would depend on what you plan on doing with it.If its an automatic now,you are much better off keeping it that way with a properly built trans and converter,as you will be a lot more consistent and ET better at the track.A 406,Miniram,28-3000 conv,and 4.10's is tough to beat at the track,but around town driveability wont be the greatest.If you have an auto now,and don't mind the labor change,or 5spd now,and love nailing a clean 2-3 shift and hearing the tires scream, a 383 and 6spd is a fun combo.Either way,if its EFI now or you don't mind the change,go with the EFI.

 

The car is an 86 Iroc 305 tpi. I like the idea of the miniram I just do not like tpis, if all of thier products are like thier regulators then they aren't worth it. I am pulling the 305 motor for sure. I just got it painted and I want to go back and paint in the engine compartment. I want it to be fast as hell, but I don't really care to run consisent et's at the strip. It's kinda like I want a street car that is just outrageous. The paint will look good too. Any more ideas?
thanks for the reply's,
Bryan

 

Oh yeah I also have a daily driver so I dont have to worry about mpg and all that.

 

If you are going to be spinning that thing up to over 6000 RPM, and don't care about your low end power all too much, you might want to go with more of a rev happy motor. I am planning on using a 377 in my car eventually.

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

 

Oh yeah, I would also suggest using the 6 speed with it. The gearing in the Richmond 6 speed is so close that it works perfectly with a high revving motor. I would take a manual over an automatic anyday, even though I have a freaking auto....

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET: 14.32 @ 97.7mph
(corrected for elevation)

 

If its not a drag car- dont get a gay auto.
If its a street car to go take some windy roads or to a car show, go with the 6 speed.
Id go with a 383 stroker (they make 400 easy)(also i see a lot of 406's blowing up from overheating) with a super ram (a ton more streetable), superram manifold, afr heads, good hydralic roller cam, headers, no cat, 4" exhaust
Also your gonna need a pretty killer suspension for all this to hook up even in 6th gear

 

In an old edition, 1-2 months ago, There was an article about an 82 z28 that had this combo in it a 355 cubic inch small block making 520 HP naturally asperated and it had a turbo 350 tranny. Its best time was 10.67/125.40 in the 1/4 and 1.38 Seconds. The "data file" lists all the specs if you want them I could post them for you.

 

Scott can you give me more information on your Brodix heads... which ones are they ? Who ported ? What size is the chambers ? What are the intake runner size out of the box and now after porting ?

Thanks,
Todd

------------------
85 Vette
383 SR Motor
11.55 @ 117
1.552 60 foot
http://corvetteforum.net/c4/beach_bum/

 

Todd85
The heads are the Brodix -10X with a 64cc chamber. Out of the box they are a 215 cc runner. I don't know after the porting but a Fel-Pro 1207 gasket fit perfectly so probably 220cc. It is a large head but with the miniram, solid roller and large stall it will be a killer. I bought them used already ported and I went and had them flow before I bought them just to be sure. They were off a motor done by Oddy racing. It was a 406 w/ carb and it ran 9.1 at 145 in a Chevelle. I am not looking for those kind of numbers but hope to be in the low 11's on drag radials.
The Brodix Track 1's are a good head even though they are a little old. If you are doing a 406, try the Brodix Track 1-X. They are brand new and flow 320+ when ported. The downfall is they use an offset 40/60 valve spacing so you'll have to use Jesel shaft mount rockers (about $950). I was going to use these but they would be too much for a stroked 350.

 

scott87iroc Z where in buffalo u from? maybe i have seen your car around, mines the bright yellow trans am, only one around like it, if u see it its me.....

------------------
1989 pontiac firebird
bright red exterior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
http://members.aol.com/j007golden/Mikey89.html
http://www.geocities.com/firebird/myfirebird.html
-------------------------
1985 trans am
factory bright yellow
4 wheel disks
16 inch wheels
305 TPI
power antenna and mirrors
t tops

 

Thanks Scott Its helpful.

cheers,
Todd

 

ONEFINE8T9

I'm from the Tonawanda/Kenmore area. I haven't seen any yellow trans am's around but I'll be on the look out.

 

ya keep a look out for me im from the w seneca orchard park area, whats your car look like???we should get a bunch of f bodies together one day and go rustang hunting....

 

i'll assume you have the bank acct. or credit cards(at least)to fund this stay with the auto it's fun to row your own gears but drvability is better with an auto(my opinion not law)if you remember back there was a tpi car than ran 10 seconds with a tpii system on it and a top speed record of 254.76mph(lingenfelter/calloway)you are gonna pull the motor anyway go with a turbo,a 355(4 bolt) with all forged internals and either port the stock tpi or go with a superram, under pressure the ltr intake isn't a hinderence as much as everyone thinks.in my opinion any internal combustion engines that will be produced 20 years from now will have a turbo and be a lot smaller than we see today as well as possibly going to a 60* cylinder bank.gives you drivability whhen putting around town lets you run a wider lsa cam less on emissions all are pluses in my book.or just go crazy and hijack a syclone drivetrain for it and be really different

------------------
87 trans am 350,L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,tb bypass,accel supercoil,hollowed maf,slp 3in. catback,a/c delete.
oh!no!i think my maf is going!!!!!!!!!!!!

14.10@97mph w/2.01 60'

slp catback is finally on!!!
fastchip prom is in.OH!MAN!
FLOWMASTER S.U.C.K.S

 

ok i figured it will be in the ballpark of around 670-700 on the motor side aÜ natural!
http://people.ne.mediaone.net/gdm

what do you all think of it?
but it is 11.2:1 CR

[This message has been edited by 87tpi420 (edited July 18, 2001).]

 

Thanks for all of the reply's. I think I'll go with a turbocharged 377 it sounds like a good combo. What is a good comp. ratio in the book I looked at it said about 8:1 for 25 psi. of course with race gas. should I go with superram or miniram
Thanks

 

91z4me post that combo if you dont mind or email me if that would be better at IROCZ2869@aol.com
thanks

 

Is the 377 going to be a new 350 block with a 3.750" stroke crank or a destroked 400 block? A destroked 400 block is supposed to be capable of some high rpm's and if that is the case, I don't think the superram flows good in the 6500 - 7500 rpm range FYI.


------------------
87 IROC-Z 305 TPI gears, exhaust, converter
14.70 at 94.1 mph
Solid Roller Minirammed 377 waiting to be installed

 

Yea I was going to destroke a 400, Looking at most of the turbocharged motor they mostly have a large bore and short stroke.

 

BryanJ Here you go

Block Bow Tie Cast Iron
Crank Lunati 4340 forged steel

Displacement 355 cubic inches

Compression Ratio 14.1:1

Heads L98 Corvette Aluminum, Ported by Lingerfelter Performance Engineering

Valves 2.0/1.56 stainless steel

Cam Competition Cams mechanical flat tappet, 254*/263* duration, .550-/.550-inch gross lift

Rocker arms Wiseco forged

Intake manifold Brodix SV-HP

Throttle body ACCEL 1200-cfm

Fuel injectors Bosch 30-lb./hr.

Fuel pump SX chassis-mount with Kinsler
regulator

Ignition ACCEL 300+ digital, MSD Billet distributor and Blaster 3 coil, Magnacore wires

Engine management Speed Pro sequential EFI

Headers Hoooker 1 3/4-inch

Ehaust system Dual 3-inch pipes with 2-chamber Flowmaster mufflers

Transmission Turbo 350 with manual valve body and Perma Cool cooler, built by
Precission Tansmission, Sarina, Ontario

Torque converter Coan, 5000-rpm stall speed

Driveshaft Dynotech aluminum composite

Front suspension Koni race shocks

Rear suspension Koni race shocks, homeade lower trailing arms, Random Technology torque arm, V-6 camaro springs (cut 2 turns)

He also has a Wilwood disc brakes front & rear a 9 inch Ford rear in with 4.56 ring and pinion. An 8 point roll cage and Jeg's driveshaft loop. The wheels are Weld Draglite 15x3.5 front and 15x10 rear. the tires are 28x7.5x15 front and 29x10x15 rear. Weight is 3358 lbs. with driver. Horses are 520 approx. at flywheel
Best 1/4 is 10.67/125.40. and Best 60 foot is 1.38 Seconds.

------------------
************************
91 z-28 305 700R4
3.73 gears out back
T-Tops and Black all over.

 

Thanks 91Z