Daniel6718

Stock 95z28 M6 with zr1's on it
stock from the tranny back...clutch and rear and gears....

mods
k&n cold air
Hooker longtubes 2.5 ory into single 3 inch cutout(electric) then STOCK catback
EWP
and madz28 bolt on tune....(from another car and i dont think its spot on)

294 337 with the cutout closed through stock catback
303 348 with cutout open

i can still put on some asp pullies(balancer ones)
58mm t/b
and a LS1 lid setup and i think i can get 320 out of it...if i wanted to i could do rockers and possibly make 335 maybe more getting it dynotuned

JakeRobb

I've never heard of putting an LS1 lid on an LT1. I didn't think they would fit under the LT1 hood.

Anyone know?

pyro719

Nice numbers for just bolt on's you must be very close to sea level

rcantrellz28

They will fit , I beleive that there is so,e minor modifications that have to be done to the radiator support, maybe a few other minor modifications under the hood. I do no that this was brought up several times not to long ago..............maybe do a search on that subject

2000GTP

58mm will be overkill for a bolt-on setup. The crank pulley and even a 1.6 roller rocker upgrade will definitely push you over the 300 barrier. I saw one car where an LS1 conversion was done, but he completely hacked out that portion of the hood where the airbox sat. I have heard of it being done in other cases, but haven't followed on it enough to see a finished result. Anyways, very nice numbers, well done.

Jazsun

Thats nice to hear that you gained nearly 11 ft/lbs torque through the cutout. Just goes to show how bad the stock catback is. It would be nice to see some dyno numbers w/ an aftermarket catback and the gains from opening/closing the cutout.

Daniel6718

picked up 9 hp also with the cutout...

and i already broke the 300 barrier...made 303...
the 58mm will be done...i might do a 52 but prolly not...the biggest problem with lt1 is the stupid intake not hacing enough volume...58 cant hurt it...

the ls1 lid setup is WAY WAY WAY better than a lt1 cold air...i picked up 2 tenths at the 1.4 mile on my ""racecar"" when i swapped over

Daniel6718

what do you gus think that these mods would get me?


ls1 lid over the lt1 cai
balancer/ud asp pullies replace stock
58mm t.b over stock(open intake to match)
1.6rr nsa with guideplates stock
new tune

1986RX7

318rwhp 353 rwhp

'94 Bad A Z28

58mm TB for your set up is over kill... You might pick up some power over the stock TB, but you WILL loose power over a 52mm TB.

MeanGreen97Z

If you want to change the valve springs let me know. I can do it with the heads still on the car. If they are old it may help ya pick up a few hp.

dangalla

oh really, care to elaborate on that. i cant see one reason why more airflow would ever hurt for any reason

Daniel6718

exactly...idk where people got this idea....its dumb and mkes no sense

JakeRobb

The idea is that sometimes the turbulence and velocity of the air are more important than total flow volume.

In general, having a throttle body larger than you need isn't going to hurt peak power, but you'll see better low- and mid-range power with properly-sized components.

One of the best examples of this is headers. You don't run 1-7/8" primaries into 3.5" collectors on a naturally aspirated 350. You'll get more power with 1-3/4" primaries into 3" collectors.

'94 Bad A Z28

As stated above, and maybe because members on this board have actually done the swap on the dyno and picked up more hp/tq under the curve and a little peak from backing down to a 52mm TB, and I've seen it done on multiple cars here in person.


But it is your car, do as you like, we're just here to TRY yo help you out, take the advice or not. Go big or go home isn't always the right option.