In the process of joining the FI club and want to know where I stand and if this is a good setup.

Here's what I've selected thus far for my 93' 396 I'm rebuilding this spring for boost.

CR 8.5:1
Forged Lunati rods 5.85 and 3.875 crank
Ross -31cc slugs coated skirts & oilers w/ Hellfire rings CC918 springs, 233/242 duration @ .050", .569"/.576" lift with 1.6 rockers, 115LSA
Felpro head gaskets 1074
Hydra Rev kit
Ported LT1 Heads flow 270/194 cfm respectively
FLP LT's & GMMG exhaust

ATI D1SC 8 or 12 rib pulley setup w/ 14psi & twin 4.5" intercoolers
ATI race bypass valve
60lb Motron inj
Racetronix 255hp and Kenny Bell boost-a-pump
CSR elec wp
HD timing chain
Stef's custom oil pan & 3 qt accusump

Delteq ignition
NGK TR6 or Autolite 103 plugs gapped .035
10.4mm taylor wires
2 bar map (87 GN)

Street twin clutch and D&D tranny still on the 10 bolt w/ 3.73's. I know but she's more a road car than a 1/4 mile car and I'm still overseas where speed isn't a issue.

That's the jist of it but I can get more detailed if need be. What kinda of numbers are blown and stroked LT1's putting down on average w/ 12-14lbs of boost? This is a wkend car for the most part but will see some abuse during the wk if the weather permits.

Is this a pretty good setup and if not what would you recommend or do different?

Thanks.

 

I dont see any problem for you to hit 600rwhp @ 14psi. Some suggestions:

I'd upgrade the 60lb injectors to atleast 72# injectors.

replace factory heads with a set of well ported trickflows or AFR heads.

replace the 10 bolt

My combo is similar except I am dpoing a

383Lt1
AFR210's
Single T76 turbo
72#, 255intank, KB boosta pump

 

Thanks for the advice. Only reason I'm not going larger w/ the injectors is I'm not really in the mood to jump to a versa fueler. That's additional cha-ching and I'm trying to stay w/ in the budget.

The 10 bolt goes when it dies a natural death. Over here on the autobahn's it does quite nicely. I only drag it maybe 2-3 times a yr and I only do it on street tires so I don't have hook problem. The car spends it time mostly at the Nurnburgring and back country roads (some of the best in the world over here IMO) so she's fine for now. Solid pinion spacer, T2R diff and girdle have held up just fine w/ the current NA 396 w/ a little under 440rwhp.

The heads would be nice to upgrade as well but the budget is the reason for sticking w/ what I have.

Again thanks for the advice honestly.....who knows I may be able to cut a corner here or there to do some of the things you've suggested but for now I have to go w/ what I have.

RealQuick what kinda of numbers do you think you'll put down w/ the T76? That is going to be a killer setup. I wouldn't mind a turbo but I'm just not feeling getting rid of my LT's.

 

Sounds like your have thought everything out. I believe someone has 72# high impedence injectors out (racetronix perhaps?)...it will be killer when all said and done!

I am hoping for 700rwhp @14-15psi on pump gas...

 

Why not low impedence??

2 sweet setup tough

 

I suggested low impedence, but he posted:

 

have low impedence injectors less problems than high impedence for FI ? What is the benefit(s) of low impedence inj. in this case?

 

Check this link out

http://www.acceleronics.com/versafueler.htm

 

cant you just get madz28 to update your pcm to know about the bigger fuel injectors? or what does that exactly do?
thanks

 

I believe the issue is that 60lb inj. is about the largest injector readily available that's high impedance. The ECU won't drive a low impedance injector like the 72s w/o a VersaFueler which is just an impedance matching box.

 

does this thing also help in any way or no?
thanks

 

Low impedence injectors will better for these reasons I guess: "You need bigger injectors, but big high impedance injectors are sluggish, with poor throttle response and a ragged idle."

 

i wouldnt even mess around with a stock pcm. Id buy a fast and be done with it no need to spend $1000s and cheap out on engine management just my opionion

 

My opinions:

Stay away from low-impedence unless you just really HAVE to have the power capability of an injector over 60 lb/hr. The 60's will support over 750 fwhp, which is probably about the limit of your fuel pump anyway. I have 83's and the Versafueler and don't like them. The car runs and drives fine, but I've been having hot start and lean bog problems that I haven't been able to tune out over the last year.

I like my stock PCM. Aside from the injector issues, it works great at 680+ rwhp with a turbo. Tuning is very easy using TunerCAT or LT1Edit. You'd be surprised how closely my tune resembles the stock tune.

I believe your stock heads will support tha power level easily. One fella made 680 rwhp with ported stock castings and an ATI. LJ ran mid 9's at 145 on stock castings. Some other guy made 990 rwhp (turbo) and pulled 153 mph in the quarter, again, on stock castings.

Your 700 fwhp will not be a problem with those parts. My last combo was an 8.3/1 383, AFR 210's, 224/236 cam, Vortech T-trim at 13 psi, Aftercooler, etc. . . that pulled 133 mph at 3750 lb. That equates to about 690 fwhp. You will have more compression, more cubes, slightly less cylinder head, bigger cam, equivalent blower, more boost, and bigger intercoolers.

 

how do you adjust your file for differnt conditions? I just couldnt trust it myself and after working with aftermarket pcms there is no comparison tuning on fly is awesome and the logging is increadible!!!