i want to build an engine for ym car using a gen1 4 bolt main 350. Here is what i want in it

-sealed power engine rebuild kit with forged flat top pistons
-edelbrock e-tec aluminum heads 2.02"/160" int/exh. 200cc/80cc int/exh runners and 64cc chambers
-Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 268/276, Lift .489/.504, with 1.6 full roller rockers
-SDPC vortec base with tpis large tube runners(all ported) and 24# accel injectors
-tpis 52mm throttlebody
-msd super hei kit for ignition
-with specified pistons and heads overall compression ratio is just under 10:1(perfect for 93 octane)

does anybody have any suggestions for a better combo and anybody with a desktop dyno i would love to hear some numbers. im looking for mid- low 12's i can drive on the street so about 400hp is my goal.

-All help is greatly appreciated as this is my first engine build

 

i doubt that vortec combo would make 400hp through a tpi setup...i have yet to see a fast combo at the track that used a TPI most switch to a different intake system.

 

My idea for more power is step up to a hydraulic roller cam and the 218 XFI cam. Also with the aluminum heads you can step up the compression ratio to 10.5:1 without batting an eye. With 93 octane I would go to 10.75:1. Also get your quench down to .035" to .040".

By the way I'm running modified TPI. With my next round of mods and keeping my current TPI system I expect to be in the low 12's.

 

i looked for the 218 xfi cam but with no luck. how could i up the compression ratiowithout different pistons or heads(block decked?) i am unsure what quench is so a definiton would be helpful. i am in an engine rebuilding class right now so im sure ill learn more by the time i build the motor.

 

The new vortech style holley stealth ram might get you there. I agree that the tpi might still be holding you back.

Here is my set up that was running 12.3's with stock 2.73 rear gearswith a race weight of 3780. 355 9.75 compression, dart stage 2 iron eagle heads 64cc. .525 .525 cam with holley stealthram and 58mm throttle body. 42lb injectors edelbrock tes headers and a flowmaster exhaust. And tuned by accell dfi.

With the stock computer and prom the car ran 12.82 at 105(due to the large injectors) and after tuning it ran a best of 12.3 at 112. and i never ran it after i got it tuned even better. Now i am running an ls1 so i will never know what it could have done with a gear and sticky tires.

 

smokin87ta i see that you live in schaumburg which is pretty close to me. where did you get your car tuned at? also where do you race at?

isnt 42# injectors too big for a mild 350?

 

I tuned it myself and i usually race at union grove because i am now running nitrous and need a cage so tech at 66 and byron are usually more strict. yea the 42lbs were a little large but i got them for a good deal and was looking for 36 lbs so after tuning it ran great and i knew i would have enough fuel for a 200 shot if i wanted.

I would recomend 30-33 lbs for a milder sbc.

I see you have 24lbs they should definitely be fine, i believe 24's usually max out at around 450 hp NA. You could always sell those and pick up some stock ls1 injectors which are 28.8 for 98's and 26.8 for 99-02's.

 

i actually dont have any of the parts yet. im still doing research. i was unaware that i could use ls1 injectors. i would also like to run a small shot of spray (75 or 100) since it will be a fresh motor. will 28.8 injectors be enough for that? also where did u have your trans built at and how much did it run you. ive been lookin for a shop to build my 700r, but they said they wont warranty it if i race.

- i also forgot to mention that it will be bored .030" so it will actually be a 355

my engine rebuilding class teacher said that if i use the smaller e-tec heads i will gain more torque, which is what i want and thats why i want to stick with tpi.

 

well i actually rebuilt the trans twice my self. It first aluminum drum casing when i still had my 305 so i rebuilt it with a torque drive kit with hardened sunshell, input shaft, output shaft. I just used regular clutches to rebuild it and added a shift kit, corvette servo, larger boost valve, and spring.

It then burnt up 3rd and 4th when i had the 355 in there and i talked to some performance 700r4 guys in florida and they said that is the hardest part to solve when making over 450hp and torque. but they told me that instead of the normal 7 clutches and six steels, to run 5 larger clutchs and add an extra steel so it makes 6 larger steels, this makes them stronger and the clutch pack larger. I also used all raybestos kevlar clutches in the last rebuild. along with the big raybestos kevlar 3-4 band that goes around the drum.

I then added a 3200 stall converter and had a 700r4 that could handle about 650 hp and torque, It wasnt cheap tho, everything probably cost me $1200 and that was all the work myself. And 700r4's are very complicated compared to th400's ect.

I am now running a th400 that had a reverse manual valvebody and trans brake with a 5500 stall converter. Which is rated a 1400 hp which cost about the same as the 700r4 and is alot stronger but doesnt have overdrive.

 

the motor i am getting comes with a b&m th350 so i will use that until i swap in a t56.

 

that would definitely be the easier way to go.

 

Tech at Byron harder to pass than at the Grove? Things have changed since I lived up there. I lived about 10 miles from the Grove. I don't ever remember having my car being checked at Byron, just hand my tech card to kid sitting in a car by the scale. I miss both those places.

 

Yea both are really nice tracks with the histroy of the grove. But its maybe becasue of the days i went also. I usually get up to gld on the wednesday night or some test and tune and i usually go to byron on a days where they are also running pro mods and other doorslammers and such.