I have a 1986 TPI 305. I want to upgrade to a 350TPI. My first question is what year motor is the simplest swap. I would like to get a serpentine setup. I am pretty sure depending on the year I go with I will need the new computer/wire harness and TPI manifold While reading "Atilla's Best Builds" I stumbled across the TPI 350
build. I am having difficulty finding some of the parts listed in this build though. Can I use any Gen. I shortblock? Also any idea if this build is boost friendly? I am considering a supercharger down the road. Atilla's build is as follows as is the parts list.. Any help would be appreciated! Is this build with stock rods, and a stock crank? I didn't think a stock rotating assy. could handle much over 5500 rpm, and once you start running over 6,000 RPM they tend to EXPLODE. Thanks for the help guys!
RPM TQ HP

2400 423 193
2600 442 219
2800 458 244
3000 459 262
3200 472 288
3400 475 307
3600 468 321
3800 478 346
4000 487 371
4200 479 383
4400 469 393
4600 458 401
4800 450 411
5000 437 416
5200 415 411
5400 389 400
5600 367 392
5800 350 387
6000 338 386

This was done using all of the following :
A 30-over 350 with flat top pistons
poorly ported iron Vortec L31 Chevy truck heads
COMP 08-304-8 cam
SD Vortec TPI base
Accel large tube runners
Accel 58 mm TB
24 # injectors
43 psi of fuel pressure
93 octane pump gas
1.75" long tubes such as Hooker 2210-1HKR
2.5" dual exxaust with FlowMaster mufflers :-(
MSD coil
And I suggest you use 1.50:1 In / 1.60:1 Ex roller rockers
Properly geared, this'll run low 12s at sea level.
And spank a peanut-port 454 with intake, cam, and headers.

 

a stock rotating assembly is fine up to 6000, but with boost i wld go all forged. Also you wld probably want different heads, but im not to sure about that.

 

Those power numbers aren't happening with a stock TPI on top of it.

Note the SD base, Accel runners, Accel TB; that's over $1000 worth of stuff, right there. And you haven't even built a motor to put it on yet.

You MIGHT, MAYBE, if you're REAL lucky (luckier than me, for sure) get your 3 dyno pulls out of a stock crank, with some other induction system besides TPI on it that was actually capable of producing those numbers. OTOH, might be like that legendary 405 HP (or whatever it was) magazine-build 305, that popped on the 2nd pull. Yeah looks great on paper; not so great when you're mopping up coolant and oil off of some dyno room's floor, interspersed with your own shrapnel that used to be ... your motor.

Consider that when SD themselves came out with that base, and put THEIR base on THEIR prepped Vortec heads on top of THEIR brand-new ZZ4 short block with THOSE runners, they didn't come up with numbers ANYWHERE CLOSE to those. Who's kidding whom?

No you can't use "any" 350. That's an 08- cam, which is a factory roller. You can get the same cam on a "retrofit" blank, but that's not what's in this BOM.

No it is NOT IN THE LEAST "boost friendly". Way too much compression. For a boost motor, you either build a BOOST motor, or you don't; if you do, it's not worth a crap without it but WITH it, it comes to life. If you don't, then it pops if you try it. It's a fork in the road: one way = boost, other way = no boost. Go one way or the other, no turning back.

Frankly, given the source, I doubt those numbers are happening, anyway. Sounds like a Desktop Dyno "build".

Be from Mars for a minute, and forget that you "like" what you see. Yank your head out of the clouds and plant your feet securely back onto Terra Firma, and examine this objectively. Now that you've stilled your beating heart, think: if somebody walked up to you on the street and started talking this crap to you, would you even HALLUCINATE that ANY of it ever actually EXISTED? Really??

 

Ok so with this motor = no supercharger. I guess I should find a 88 firebird camaro w/a 5.7 tpi, and then i got a donor car w/my serpentine setup to start! How much HP would a motor built for boost have before a supercharger is bolted up? what kind of compression should i be running?

 

Depends on a few things, how much boost your planning on running, how much compression, and being able to control detonation. Just something to note, not one LC2 (Grand National engine) left the assembly line with forged parts, they were all cast, even the TTA's, and all of them were tuned for up to 15-psi of boost from the factory. Now, that isn't to say that you can just slap on a supercharger and run 15-psi, you need to keep your air temps low, and tune your fueling and timing properly. If you can do that, and not beat the death out of it at every single stop light, the engine will last you for a long time....