dec010974

iTrader: (1)

hello ls1tech family. im currrently running FI 5.3/4l60e and havent really gotten all the bugs worked out. current issue, engine stalls after start-up. long story short, i have a LQ4 that im thinking of running the 6LS controller, holley carb, '02 ls6 cam, with the LS3 heads. opinions are needed. thanks. clark.

68 RS Convertible

iTrader: (1)

I think you may want a bit more cam and a bit more compression. My motor started out as an LQ4. I had it bored .030 and put in Mahle flat top's. I took .025 off my L92's. TSP 233/239 cam. I'm also carbed with a 6LS2 ignition. Very impressed with the preformance. Just my .02 about the cam and compression. Good Luck!

DCx

iTrader: (12)

yeah i hear the LSA on the stock fuel injected cams isnt good. you can get away with a lot more cam on a tighter LSA. I have a carbed ls1 and im very impressed with the power. what ever you do run a custom timing curve. those pre set pills that the ignition box comes with are junk.

dec010974

iTrader: (1)

thanks for the opinions, dcx & 68 rs. bump up compression, upgrade camshaft, use different timing curve, got it. i also want to now why those who chose of carb instead of FI?

68 RS Convertible

iTrader: (1)

I thought having a modern engine with the proven preformance of a carb would be cool. I was really affraid of having to run the ECM and all of the unknowns (at least unknowns for me), of the computer. Little did i know that my laptop is my best friend for tuning with the MSD ingnition. Plus it really throw's people for a loop. They take a look under the hood and have no clue what it is!

Pop N Wood

iTrader: (1)

I went carb in part because it was the cheapest way to finish off a new crate motor in a non-FI vehicle. That won't be true if you already have all the FI parts. The carb'd crate motor also made 35 HP more than the same motor with FI.

But the main reason for going carb is I have always wanted a hipo carb motor and this was my chance.

I wouldn't scrap the FI just because the motor isn't running right. Worst case just take it to a local mechanic and have another set of eyes look at it. Chances are it is something basic and will work fine after getting past that hurdle.

A carb does have some drawbacks compared to FI. Nothing as bad as some guys make out. But they can be a bother at times.

DCx

iTrader: (12)

i had a new carb from a previously built engine, plus the cost factor. like 68 RS Convertible said, its pretty cool to see your timing curve and rpm on the computer screen. i also use an external FAST wide band tuner to fine tune my carb.

from my understanding the victor style carb intakes offer more power over the FI because of the longer runners.

dec010974

iTrader: (1)

i gotta give a shotout to DCx, 68 RS, & Pop n Wood. you guys gave great advice. thanks. i played with my 5.3/4L60e set up and it seems to be working properly(pop n wood). guess you can say that i saved about $1900. shor'dee will stay FI for now. i will get a second pair eyes the check everything out plus, work on my shift points. i dont think i need a full dyno tune. everything is stock. and again, thanks LS1tech fam.

ramdaspadhye

iTrader: (3)

http://www.superchevy.com/technical/...l92_heads.html

http://www.hotrod.com/techarticles/e...t_2/index.html

dec010974

iTrader: (1)

hello ls1tech family. im back with a new new twist. i have a lq4/th400 that im trying to make road worthy. my carbed lq4 set up is ready to be pulled for the FI setup. yes I said it. i want to remove my carb and go FI. using a carbed on a lq4 is not making sense to me, plus its a headache. how do i start my tuning? the cam in my lq4 is-228/228 dur. @.050:
112 LSA: .558/.588 Lift. as of now im using pill #5 with my msd 6010. the msd soft ware is on my laptop. where do i go from here. the guys at msd tech are not customer friendly. the spokesman stated to me that, "trying to tune your car is dangerous. why would u do that? tuners have plenty of experience. you should seek a professional". i wanted to tell this chump, if he's dumb enough to do it, then so am i. I just need some direction ls1tech. lead the way ls1tech fam & i will follow. Thanks in advace. Clark.

DCx

iTrader: (12)

sorry I'm late to the party i have a pretty heavy cam in my ls1 its a Texas Speed Magic Stick 3 cam - 237/242 .603/.609.

here is a quick run down of my engine:

Stock 2001 LS1 short block
Texas Speed Stage 1 ported LS6 heads
Edelbrock Victor Jr intake
MSD 6LS timing box
Texas Speed Magic Stick 3 cam - 237/242 .603/.609
RollMaster double roller timing set
Stock Rockers
Texas Speed push rods
LS7 lifters
Wegner motorsports valley tray with breather
Melling high volume oil pump
ASP 25% underdrive pulley
ARP head bolts
ARP rod bolts
ARP balancer bolt
autokraft oil pan and pickup
Hooker 1 3/4 ceramic swap headers

Holley HP Street 750 double pumper 70 primary, 80 secondary jets.

here is a screen shot of my timing



my car is a manual trans, T56, with 4.11 gears 31 spline 9" rear end.





my car screams dude. pulls hard as hell all the way to 7000 rev limit

dec010974

iTrader: (1)

Hello DCx. I'm glad to see you hit my thread. I pmed you my number. If you could tell me explain to me how u were able to get the software loaded and working I would be willing to put my carved set up back on my truck. Please give me a call. Clark.