rx-7Lt1

Hey everyone, im new to the forums and i had a big question for all the rx7 lt1 experts.

I currently have an 87 rx7 vert LT1, and im looking to get a lot of HP. I was thinking of turboing the LT1 but not sure what i need to do or whats required. Money isnt really the problem, its just getting it done and getting it done right thats my concern. Im looking for very a lot of hp but nothing crazy out of hand. Just need to know what my stock internals can handle on boost and what i need to upgrade for more power.

Also what turbo i should get, and custom fabrication is the way im going.

So if others could please help id greately appreciate it thanks!

IndyFC

the stock LT1 would handle around 5.5psi on the stock internals. If you tune right probably 8psi max. Build the internals for boost and you should be good to go on the boost situation. Head over to www.ls1tech.com and read through their forced induction section. Best help you'll ever need.

rx-7Lt1

thanks!, browsing through ls1 ive seen some good rides, im surprised because ive never seen a 95 camaro would be twin turbo. I use to own a 94 camaro and only saw a rear turbo set up. Never could i imagine seeing twin turbos in the engine bay, quite wild.

Seems i have to probably build up my internals and rear end also. some crazy process just wish someone who had a HUGE amount of knowledge here in florida could turbo it for me with out head aches. But of course thats taking the easy route and kinda unsafe sometimes.

gnx7

iTrader: (10)

Stock LT1 will pop once you get past about 500rwhp. Their pistons were not designed for forced induction. They will ultimately crack.

Best bang for the buck is to dump the LT1 and put in an LS1. Better flowing cylinder heads, intake, 10x better ignition system, stronger factory cranks etc.

A stock LS1 block/crank with forged rods/pistons (about $3500), ported heads ($2K), stock LS6 intake ($300), ported stock TB ($100) can support 1000rwhp.

If you propose to make big power in a convertible you better get your head checked and a full rollcage. Beyond 11.99 and you need a full rollcage to be NHRA legal anyway.

Realize that there is little room in an RX-7 for a V8 and turbo. It can be done... but it will be a PITA to work on. Your best bet would be a stroker motor that can make 500rwhp+ and then add some nitrous. Biggest problem will be trying to put the power to the ground safely.

-Mark

rx-7Lt1

Thanks for the information mark, rollcage is being installed i already knew that lol.

But i spent a lot of time getting the Lt1 in there and im just going to stick with what i got.

I already know that an ls1 is WAY better than the lt1, i use to own a 94 camaro z28 and ive riddin in an ls1 z28, pretty good difference.

But lets see how it goes. its going to be some tough work but i want to get it done.

Ill post more if anything thanks!!

IndyFC

Just keep the LT1. Head over to some Corvette forums and look at what the LT1 guys are doing performance wise.

I know when I had my '96 Vette with bolt ons and a 100 shot I was hitting 550rwhp on the dyno. Never took it down the strip cause it was made for the track.

An LT1 massaged right can make big power. You just have to get the internals worked right.

rx-7Lt1

I had my contact work a list for me and she doesnt have prices yet but she said something like 10k. Ill post up the list when i get it. and then if you guys can tell me if its a good idea to do whats on the list or not.

Thanks

rx-7Lt1

The list

Garret GT40R or GT40 or T78
Turbonetics Racegate
Turbonetics Raptor BOV
Custom Manifold (exhaust)
Custom Piping
Spearco FMIC
Downpipe
Midpipe

Fuel Rails
750cc Injectors
Braided Lines
Fuel Return
Walden Fuel Pump
Oil catch can
100mm TB
Aftermarket MAF
Aftermarket Radiator

ECU
Gauges: EGT, Boost, A/F, Oil Pressure

Cam (boost friendly)
Valvetrain (springs, valves, retainers)
Intake Manifold

Further Power:
Pistons
Rods
Knife-edged crank

Any suggestions please help me out!, also what rear end should i get cause i know the stock one wont handle the power output that this car will give out.

CharlesGordon

If you are going to spend the money to build the internals. then it really isn't worth the extra money to buy an ls1 IMO. Stock for stock the LSx is a much better platform, but once you spend the money on internals, the sky is the limit on either block.

If I were going to build a turbo setup on a v8 rx7 I would highly consider going with a remote mount deal. It doesnt sound like your trying to make 800 HP so a RM setup can be more then effcient for your needs. It also keeps what little free room you have in the engine bay and brings all the extra heat to the back and under the car.

digitalsolo

iTrader: (2)

I could understand this in an FD, but in an FC, there is a TON of underhood space. I've set two T88 sized turbos in the bay with the motor and all accessories mounted with plenty of room. Downpipes are the only difficulty, but the remote mount will have the same problem with the charge pipe so it's a moot point.

89FCVert

Hey There,

rx-7Lt1 is there any new information on this?

rx-7Lt1

Im still trying to find prices, its not easy because im not 100% sure where to look.

Also i might get an LS1 not sure yet. Lot of things to do just need some more research.

Can anyone help me out with the list i posted up and where to look?

rx-7Lt1

Ok another update, i got another one of my contacts that has a guy that can practically do everything for hopefully a bit less than 10k. Rollcage, fabrication, induction the works.

Currently he is getting the price quote for me so if its in the right price range ill go forth with it.

Ill do my best to post pics of the process if i can.

Orr89rocz

so you goin with the turbo idea? i would seriously look into a 383 or 396 forged rotating assembly for that LT1 if your gonna build internals. cubic inches are great to have since most cranks/rods are same price once you go forged everything. might as well go bigger if its the same price

then drop a nice cam in it and good heads like AFR lt1 heads.

on a 383-396 with right cam you'll make near 475-500whp. or 450 if you want a tad milder cam.

if you drive alot, i'd shoot for 400whp all motor and run a 125shot. that should be all you really need without the cost of a custom turbo fab. or even a 200shot with the good internals.. thats a very quick car.

T78 would be killer on that 383-396. it should spool pretty quickly and make great midrange to high rpm power.


as far as a rear end, look into a ford 9inch or chevy 12 bolt setup for your car... not sure what rear youll need that will fit a early rx7. but any good shop should beable to take a rearend and weld mounts to accept stock suspension and stuff.

89FCVert

Damn! This sounds like it is going to be a little monster!