I want to make around 600+ hp, I want to use a single turbo and if possible a L98 block (not sure they can handle that). I need to get some idea of what i need to start buying (what heads, cam, etc..) so if anyone has acheived those #'s i'd like to see their setup.

 

Points to SEARCH button.....


Your answers await young grasshopper.. BW

 

Here it is:

https://www.thirdgen.org/techbb2/search.php

 

in the meantime:

3/4 cup brown sugar,
1/2 cup margarine,
2 beaten eggs,
3 mashed very ripe bananas,
2 cups flour,
1/2 teaspoon baking soda,
1/4 teaspoon salt,
1 teaspoon vanilla extract,
1 handfull copped walnuts

mix the first two ingredients together, then mix in the second two ingredients. Then mix in the rest. Cook for 60 minutes at about 300 degrees. Best banana bread ever!

 

HAHA

seriously though, this is my plan so far...
L98, forged crank and pistons (8:1) AFR heads, not sure about cam yet. A HSR, dfi and a T78 turbo. I guess my question is will a L98 being 2 bolt mains and all hold 600 HP? is that # even posible with that setup?

 

sounds good to me. I'm not a turbo guy so I can't help you much there, but your engine combo sounds good. I personally wouldn't worry about not having 4 bolt mains. Many people will argue that 4 bolt mains will actually weaken your block. I honestly dont remember seeing anyone on these boards having a breakdown because they only had 2 bolt mains. More commonly, breakdowns occur from busted rods and/or pistons that aren't forged. That's my 0.02

 

If you're only aiming for 600hp, then your turbo choice is probably a little large.

 

What would be a better turbop choice? like a T70? or smaller?

 

You could go even smaller than a T70, but I would say with a T70 you would be putting out over 600hp at the wheels.

 

Ok, well what i want to be able to do is have a boost controller so i cna run low boost everyday and crank it up for the track. Will that work? How about a T66 or T61 are those big enough? 600 rwhp sounds good for me.

are these turbos any good, they seem oftely cheap for new. I'm new to this turbo stuff so any info is greatly appreciated.http://cgi.ebay.com/ebaymotors/ws/eB...tem=2470571488

 

i was wondering the same thing about those turbo's, somebody please chime in...

im still learning about turbos, but both those A/R ratios look kinda small... would spool real fast on an sbc, and i dont know about the compressor A/R, i think you need bigger.. i think these are desinged for supras and RX7's with a single turbo conversion... just quesssing but i bet two of those on a 427-502 BBC would be the ****!

also unless your planning on running really high boost levels (not required for 600 HP, especially with a T70 or so) you shouldn't need to go as low as 8.0:1 i would aim for 8.5-9.0

and i would think that if you keep the motor under 6000-6500 RPMs a two bolt main is fine, just get the best ARP studs


if it was me i would work on buying the turbo set up first, slap it on cause the stock L98 can handle 500-600 HP (as long as you have a good tune, and keep that detonation away) its just a matter of how long

then depending on your budget you can buy

forged internals, or vortec/LT1 crank rods are rated at 500 HP from GM, but word on the street is they can handle a lot more

forged pistons are a must i think, even if they are cheapies... if your gonna rebuild it anyways

for heads i would just do some vortecs, pro topline, or dart iron eagles depending on budget.. if your loaded go for the AFR's, but otherwise even the right set (casting #) of ported stock heads would be sufficient

and a good NOS/blower cam... i cant make a specific recomendation here... but again if your on a budget the stock TPI/LT1 cams arent all that bad for a boost application

for intake although a TPI will work, an LT1 or HSR would work better

 

Common guys… do some reading first before you spend a lot of $ on the wrong stuff. Half the posts here are making me cringe. The basics here have been hashed and rehashed here and on dozens of other sites across the net, and it would take you much less time to click here:

then it would take me to type all the answers (and you'll see many things that you haven't even considered asking about and multiple opinions about the right way of going about these things).

 

https://www.thirdgen.org/techbb2/sho...42#post1278542

 

thanks for the info, looks like ill buy TRW pistons everyone seems to like those. and my fears of L98 being to weak with 2 bolt mains is gone now. Again thanks for the information. BTW i'm not just some dumb young kid with big plans, i'm very serious about this motor.

 

TRW's are good as long as you don't plan to rev them to some insane rpm... 2 bolts are fine. Start with what you have and upgrade when you need to, unless you're building something now...

 

Is that because they're (trws) relativly heavy? The motor i'm building isn't in my car, my 305 runs fine and i'll just stay content with that untill i am done with all the stuff i want to do. I have enough dough to have the motor completly done by the end of the summer but with that much Hp i think i'll still have quite a few things left to do (tranny suspension and rear). BTW why is the chevy bowtie icon next to my post incomplete and have a hole in it? is it because of my low post count?