FUN LS1

Which upgrade from stock LS1 yields the best HP bang for the buck?

TPIS LS6 Oval ~ $1,400 (paying LS6 Core charge)

FAST LSX90/NickW90 ~ $1,400

SLP LS6 & DYI TB porting ~ $500

If you've got one of these set ups, what'd you gain? Would you buy it again?

Mike K.

thats got to be ls6 by a long shot. The fast is better but costs nearly double and if you don't port it its not much better at all IMO.

TINKRD

iTrader: (27)

all depends on your application.

cam only? LS6 intake

cam/heads/big cam? FAST 90

big cubes? FAST 90

i've done a month of non stop searching and reading (when the search button actually works.)

Drew778

iTrader: (2)

I'd just go with the Fast 90 intake, NW 90mm TB and be done with it.

FloridaZ

Speed inc has that 90/90 combo for $1175.

tbick

iTrader: (28)

if you keep an eye on the classifieds you could probably get a fast 90 combo for $900-1000. each time i see one for sale im tempted to buy it. it seems like most people get about an extra 15 rwhp when they upgrade to the 90mm combo, but i guess those are all high rpm gains, not alot gained under the curve. ill probably just buy a ls6 intake since i dont have plans for major mods any time soon.

DrewSG

iTrader: (1)

Jesus.. I thought the Fast was only around $700

How does a ported LS6 or do against the Fast?

Drew778

iTrader: (2)

The $1175 is for FAST 90mm intake and NW 90mm throttle body

orangeapeel

iTrader: (18)

Can't see this being a bad decision.

FUN LS1

You're right; none of the set ups are "bad" decisions, and yeah, I left out the porting costs. Shoot, I think they're all good, but I was trying to get a "bang for the buck" kind of comparison. Most of the set up plan wasn't clear, though, sorry. It's going to get ported & polished heads (leaning towards AFR 205's, but the new World Products 15* heads look interesting, too), plus F13 cam, etc. Complete plan is here: http://chrisnrobinsmith.com/transam.htm. I was also planning a TNT F1 dry-shot (upgrading in-tank fuel pump and injectors), which makes the TPIS Oval a bit of a problem...

SouthFL.02.SS

TPIS OVAL
https://ls1tech.com/forums/generation-iii-external-engine/132102-dyno-test-stock-ls6-tpis-ls6-fast.html

slow trap

iTrader: (22)

i'd say the 90/90 since h/c is part of the equation allready.room to expand later on also.

FUN LS1

Great! Thanks for the thread! I think what's suprising is the small advantage over the stock intake that either TPIS or FAST offered. Doesn't seem to be much more than porting the TB on the stock intake would add...

(The assumption here is that the stock intake is LS6)