As we all know, the 1992-1993 (I think) LT1's are different in a couple ways (SD), will this affect mods that would work well on a 94+ MAF?.

My question is what's the quickest route to 12's and how much Hp would I need to get there? Staying ALL motor. I'm new to the LT1 scene and have read a little about cams/heads doing wonders on these motors. I was leaning towards the GM847 cam and what heads? Lloyd Elliot ported LT1's (how much does he charge?)? Also, what are some other little good mods, bigger injectors? I'm going to also get a custom programmed chip, probably madz28.com, or someone, any reccommendations?
What kind of MPG drop should I see?
Thanks guys!

-Rippin

NOTE: I don't know what "driveability" or "streetable" means

For the 12 sec timeslips, assume appropriate suspension/traction. The car is focused on handling but will still be able to get the power down.

 

I also have heard rumors of cheap Lloyd's heads that produce good #'s, and am installing a 230/236 in mine hopefully this coming spring. I would be interested to find out about Lloyd or other porters in dallas, the install will be done there.

 

Quickest way is Headers, Rockers, Stall.

Headers, Cam, Stall gets you there too. Just depends on how much $ you want to spend.

 

No 1992 LT1's...

Ported stock LT1 heads, long tubes, 3" header-back, decent cam, supporting valvetrain, traction, some suspension...stall, trans cooler and 3.73 gears if you're an A4...4.10 gears if you're an M6...

e-mail Lloyd about porting heads...he proves the best performance for the best price...

NightTrain66@msn.com

 

Corvettes had LT1's in 1992.

I've already got a 2.5" Cat-back, how much will that hurt me? So any input on the 847 Cam? Rockers--1.6? I've even heard of 1.7 LT1's? My car is M6 so 4.10's I've heard are PERFECT.

Thanks for the input, I love this forum it moves so fast!

-Rippin

 

Vettes were LT1 in 92 with the SD ECM.

But anyways, with SD, any real changes, like cams/heads, require a new tune, MAF cars can compensate to a degree with mods, but SD can not since they rely on pre-programmed MAP tables.

I went with a 93 ECM instead of the 95 on my LT1 since SD can make the most power on a N/A car vs MAF. If you are going with a blower, MAF is the way to go, I believe, at least from what I read.

 

You're right...sorry I'm always assuming Camaro's...

2.5" cat-back on an LT1 engine? Isn't that smaller than stock? I'd advise opening up youe exhaust a bit more...even a smiple cai would help...

 

Zepher, do you burn your own chips?

Also, one more thing. With Lloyd Elliot ported heads and a GM847 cam, will I pass emissions? If not, what cam should I go with?

-Rippin

 

ya, I burn my own chips.
I am not sure about the heads and the cam passing emmisions. We don't have a sniffer here, just a visual, but I can get around that too.

 

How would a CAI help with exhaust? J/K, I think you meant a cut-out

 

Be careful on your gear selection....93's also are different in the transmission gearing dept. Our 93's with the M6 have the M29 or M28 transmissions. If you have factory 3:23's you have the M29. If you have a 2:73 rear then you have a M28. The difference is in the gearing. Ist gear M28 - 3.08, M29 - 2.97 94's and up have a 2.66. I personally think 3:73's are the way to go on the 93's. Also this is my favorite website and has a lot of good info but another good site that specializes in the 93's is http://www.speeddensity.org/
As far as chips go http://www.pcmforless.com is the best I have heard of. All kinds of tunning for mods. Hope this helps.

 

to keep your car "streetable" you dont want a huge crazey cam.

i wouldnt go much more then around 555 or 560 lift (my opinion)

110 pr 112 lsa. mine is 112 and is a little rough at 2500 rpm. 110 would be worse

the 847 is a good cam. i chose the comp xe 230 236 112, works well. but i'm running a4 with stall.

you dont want to run the 1.7rr i'd recomend getting a larger cam and go with 1.5rr i run the 1.6rr does good but it puts the angle on the pushrod in a bind.

the lt1 responds well to performance mods. high compression dependable mjust needs to breath.

847 cai headers tune. 12 are easy, just spend the money

 

My 6-speed came out of a '97.

So just the 847, ported heads, and headers and I'll be there? Any ideas of rwhp? Are stock injectors enough? Thanks

-Rippin

 

Having talked to lloyd a few weeks ago i was asking him the same thing (wanting 12's) I have a 93 6 speed car with 3.73s and your basic bolt ons (Headers, catback, CAI) stuff like that. I was told with the cam i was looking at (cc306) and his heads and some 30 lb injectors and a 52 mm tb aslong as i hook up ok i shouldnt be supprised to see deep 12s 12.40s and such. Aslong as you have a decent tire and probly LCAs with Reloc Brackets and mabey SFCS and a TA you should 60 foot like a champ.

 

Is there a tag on the tranny to differentiate an M28 from an M29?
I've got a 93 T56, but I didn't check the rear gears on the car it came off of.
I've got 4.10 gears in my LS1 rear in the 86 Trans Am.