i wanna start to swap in a lsx in my 89 formy but i wanna go carb..i know i must get-

motor/4l60e combo

edebrock ls1 swap package includes msd box for ignition the coils/carb style intake

coversion torque arm

conversion motor mounts and tranny cross member

conversion headers

maybe the the fuel lines??

if theres anything else i forgot or missed..please tell thx

 

I think what you'd be missing is the benefits of EFI.

Carb on LSx or LTx is, in my opinion, all pain no gain.

 

don't buy the edelbrock msd package, buy the msd 6010 box separate so you can program your own timing curves/total timing into the box. The edelbrock box sucks in comparison.


Carb on LSx is the way to make more power than messing with super expensive EFI intakes. Not to mention you can lean out a carb for gas mileage, then pop in bigger jets and make some all out passes. Plus there is no $400-600 tune needed after every mod or cam swap.

 

But, the parts needed to make the carb swap will cost more than upgrade parts to EFI. So, where's the savings?

Plus, if you're paying $400-$600 for each EFI tune, you've got more money than brains. I know people like that, personally I'm not one of them and don't even hang out with them. There's more than enough help available on line to handle EFI tuning without paying a shop to do it.

 

thx for the info guys....is there anything im missiing for the swap

also...would the Vic Jr ls1 intake fit under the stock(formula) hood

 

nobody knows?...would the perfomer intake fit atleast?

 

Fit the engine, or fit under the hood?

I still don't see the attraction to this.

 

bigger injectors, a fast 90 throttle body and intake, etc all add up to much more than a carb swap ever would especially if you already have the carb and fuel system setup. I honestly don't see a reason to run EFI on it.

 

unless you want to run BIG RPM all the time go with the performer RPM. It's shorter and a dual-plane that will work GREAT up to around 6500. Also, the MSD box that uses the pills works fine(don't let anyone tell you otherwise) I've got one(for sale) but decided to go with the 6010 because I'm going to spray my motor and want the timing retard I can put in with the laptop. The carbed motors make HUGE power and still look plenty cool. Hardcore EFI guys just don't understand!!

 

It's your car and your money. Do as you please.

 

No, hardcore EFI guys knows that with it, you can have the MPG and the RWHP.

Show me a carbed LSx motor that makes 500hp to the wheels, and still gets 30mpg on the highway running 4.10 gears and I'll never say another word about it.

 

no the edelbrock box with the "chips" runs FAR too much total timing.
It's only a primary jet size swap from excellent mileage, in fact you can run LEANER on a carb since you're not limited to 14.7:1 I've seen some on ls1tech running 16:1 around town. I don't see any getting 30mpg though with heads and a big cam and 4:10s. Maybe a 6 speed will get close but definitely not an auto.

 

I probably wouldn't say another word about it either short of the fact that unless someone is seriously fudging the math, none of you guys can actually show me a 3rd gen out there making 500rwhp that gets 30mpg on 4.10's. A new stock Z07 vette doesn't do it either!

 

4th gen T/A running LS1 with pretty good size cam and ported heads making 500 to the wheels (seen the dyno sheet) runs mid 6's in the 1/8th and gets 30mpg on the highway with the cruise and a/c running.

And yes, it's a 6-speed

There's no such thing as a Z07

and I would never run an LS1 at 16:1, that's just getting really stupid.

 

wow, I'd have to agree with the 16:1. Still doubt the credibility of 30mpg with a 500hp LS motor. Basic physics won't even allow that to happen! I can see 22-25 MAYBE...but 30? Nah....