My low milage turbo Prep

[edsel1134]

Ok so after a lot of thought, fund management, and internets reading I think im going to start prepping for a turbo build for my M20. I have recently read so many threads my head is spinning. But it has given me a lot of insight and makes me proud to be part of R3v. Now ass kissing aside im thinking about doing my usual turbo prep before buying the actual parts. Im thinking Cometic Headgasket, 19-21 lb injectors, megasquirt and so on. My car has 113k original milage. The one issue im having is the fuel pump delema. Do i just got Walbro 155? Also noticed that there is a metal line pinched under the car and there is a hissing sound coming from imbetween the driver side front and rear seats near the frame. Since i have noticed this the car has become hard to start and seems to run rich at times. Advice on that please as well. Im thinking low boost 250whp goal. Now i dont know a lot about the M20 but i have turboed a few s50-s52 and one S54 <3. All insight is welcome. Figured i would try the pro's here before moving to a less appealing forum for help.

[Dj Buttchug]

TRE 255lph for the fuel pump

[Good & Tight]

Stock fuel pump is good for 400hp.

[kamotors]

Yup stock fuel pump works just fine, and you'll probably need 30lb injectors at a minumum for your goal of 250whp. might as well go 42lb or 60lb so you have room to improve.

[edsel1134]

really? thats awesome may need to replace it anyways but cheaper to go OEM when i can.. and wow 42lb? must be something with it not being a coil driven spark system..forgot what i ran on the s50/s52's but dont think they were 42

[edsel1134]

can some one snag me a link or part number for the injectors listed above? stock fuel rail?

[edsel1134]

And how's the stock block safe too?

[berlow94]

I'm running an NA built S52 with grey top 24 lb injectors. Everyone I know who is turboing goes 42 or 60. Im also running a 318 in-tank pump (converted from dual pump setup). Absolutely no problems at all and I'm looking at close to 300hp.

[edsel1134]

Yeah just don't want to dump 3-5 k on a swap and then worry about s series failures lol

[Pootis]

http://shop.zzperformance.com/store/...jectors-6.aspx
http://shop.zzperformance.com/store/...Injectors.aspx
I'm running the lucas 42's and have no complaints but these 60's are good too

[Me+SPEED=]

Don't waste your money on a Cometic Headgasket. They have a tendency to leak if the block or head arent prepped right. Go ARP's with goetze head gasket. You have three lines running along the frame, fuel pressure, fuel return and EVAP. The hiss you hear is a vacuum leak from your pinched EVAP line.

[edsel1134]

Don't waste your money on a Cometic Headgasket. They have a tendency to leak if the block or head arent prepped right. Go ARP's with goetze head gasket. You have three lines running along the frame, fuel pressure, fuel return and EVAP. The hiss you hear is a vacuum leak from your pinched EVAP line.

Evap line could be causing the hard start.. And advice on fixing it?

[edsel1134]

And thanks for the insight I'll look into it tomorrow

[edsel1134]

From what I've read your right all I'd need to do is headgasket and apr to run low boost safely

[einstein57]

Metric blues on your existing head gasket will handle 300whp all day. I speak from experience. Rough rule of thumb is whp/10 = required injector size. You want to be 80% or below on the duty cycle. Everyone says 42 because you won't have to worry a out changing them out when you eventually grow tired of 250whp. Also leaves headroom for e85