Woot for SOHC Single Turbo

[J-Groove]

I'm glad to see some SOHC love.

Post up some pics in this thread.

I can't wait to see how this all develops.

-John

[Purdue3KGT]

This is exactly what the SOHC 3000/Stealth platform needs to get going... I know everyone dogs them and says "just TT it or buy a VR4" but it has turned into that redundancy that everyone hates. It is like the 99 conversions... everyone has done them. I am glad that someone is taking the initial leap of faith and trying to pave the road for us fellow SOHCers. If enough people show interest, maybe we could get a sponser to take notice and build a custom kit. I know I would pay up to $1500 to $2000 for a single turbo kit.

[kendo]

it makes sense to me to show some love for the sohc. there were more sohc made than anything else in the later years so that should mean there are more sohcs out there, still running,than anything else.just an educated guess and i know its probobly not true as afar as 3si member cars are concerned.

[J0hnC14rk]

Originally Posted by Purdue3KGT

This is exactly what the SOHC 3000/Stealth platform needs to get going... I know everyone dogs them and says "just TT it or buy a VR4" but it has turned into that redundancy that everyone hates. It is like the 99 conversions... everyone has done them. I am glad that someone is taking the initial leap of faith and trying to pave the road for us fellow SOHCers. If enough people show interest, maybe we could get a sponser to take notice and build a custom kit. I know I would pay up to $1500 to $2000 for a single turbo kit.

I think I would be interested too, but probably not until a couple years in the future.

One question though: I love how the SOHC 6G72 seems to run forever, will a single turbo hurt that reliability to any significant degree? I don't really know enough to say if this is a stupid question or not, but I am curious.

Please note; this would be for those of us who wouldn't go boost-crazy, just enough to beef up power a good bit, nothing crazy. (I know that if you throw too much boost at (into) an engine, it will go pretty quickly.)

[Konfyoused]

Doing the single turo on my '91 stealth base has been something i've been thinking about for a long time. a friend of mine has a stock grand national turbo he told me he'd contribute to it, for the piping i was just planning on comming off the stock maniflds and running up over the trans into a single T4 flange, and maybe using a maft pro or something similar.

[gipper72488]

I'm glad to see some SOHC love.

Post up some pics in this thread.

I can't wait to see how this all develops.

-John

haha ill post some of mine up when i get there. right now all i ahve are pics of the turbo ihave and the boost gauge i got. but how could we not love the sohcs? matt had his at 246k, no oil change since 05, ran it dry on oil and coolant, and its still runnin. the highest mileage 3/s is a sohc. plus i just personally love mine because its my 3/s and i want to see what its got lol. id love to get about 260whp out of it and shock a vr4 owner from a roll lol.

This is exactly what the SOHC 3000/Stealth platform needs to get going... I know everyone dogs them and says "just TT it or buy a VR4" but it has turned into that redundancy that everyone hates. It is like the 99 conversions... everyone has done them. I am glad that someone is taking the initial leap of faith and trying to pave the road for us fellow SOHCers. If enough people show interest, maybe we could get a sponser to take notice and build a custom kit. I know I would pay up to $1500 to $2000 for a single turbo kit.

i know right? hell it would do 3SX and all the other vendors some good just to produce the manifolds for a turbo set-up and sell them for like 300$ a peice. id rather pay 3-500$ for a set of premade manifolds, then pay about 50 or so and do alot welding, fabricating and cussing lol.

I think I would be interested too, but probably not until a couple years in the future.

One question though: I love how the SOHC 6G72 seems to run forever, will a single turbo hurt that reliability to any significant degree? I don't really know enough to say if this is a stupid question or not, but I am curious.

Please note; this would be for those of us who wouldn't go boost-crazy, just enough to beef up power a good bit, nothing crazy. (I know that if you throw too much boost at (into) an engine, it will go pretty quickly.)

yeah. the sohc only runs a 8.9:1 compression, which is a fairly boostable compression. the thing that slows the sohc down as far as boost is that they have no knock sensors so you cant monitior the knock when you are tuning. personally i think that with upgraded fuel, 6psi, and a good tune you should be able to spank most mustang gt owners, and z28s(lt1s). as long as you take care of the car it will be ok

[Purdue3KGT]

I don't think reliability would take TOO much of a hit. Obviously when you add more moving parts it complicates the equation... but I do think we have a fairly stout base to start from. As mentioned before, the stock CR of the SOHC is 8.9:1. That is just a tad over the 8.5:1 of the TT's. I would say 7-8 PSI on a decent single would be fine.

This is where the making more performance parts for the SOHC takes root. Adding cams, cam gears, intake plenums, exhaust manifolds can really give some decent numbers. I would "speculate" to say that a single turbo SOHC running 7-8 pounds could hang with a stockish to almost BPU TT. The main issue with turboing is traction. FWD and turbo don't usually work too well. An LSD, Solid motor mounts, and wide slicks are almost necessary to plant any of the power.

Overall, it WOULD cost a decent amount of money, probably more than if you just sold the car and bought a VR4. The goal is to make something fun that you enjoy working on and have the pride and joy of saying "you made it." I can only think of 1-2 single turbo SOHCs EVER. How many twin turbos are there out there?

[gipper72488]

Originally Posted by Purdue3KGT

I don't think reliability would take TOO much of a hit. Obviously when you add more moving parts it complicates the equation... but I do think we have a fairly stout base to start from. As mentioned before, the stock CR of the SOHC is 8.9:1. That is just a tad over the 8.5:1 of the TT's. I would say 7-8 PSI on a decent single would be fine.

This is where the making more performance parts for the SOHC takes root. Adding cams, cam gears, intake plenums, exhaust manifolds can really give some decent numbers. I would "speculate" to say that a single turbo SOHC running 7-8 pounds could hang with a stockish to almost BPU TT. The main issue with turboing is traction. FWD and turbo don't usually work too well. An LSD, Solid motor mounts, and wide slicks are almost necessary to plant any of the power.

Overall, it WOULD cost a decent amount of money, probably more than if you just sold the car and bought a VR4. The goal is to make something fun that you enjoy working on and have the pride and joy of saying "you made it." I can only think of 1-2 single turbo SOHCs EVER. How many twin turbos are there out there?

haha yeah thats why i said race from a roll lol. the turbo im using is pretty small so its gonna have almost no turbo lag. which means that i wont be preloading at the track in hopes of getting decent traction with it lol. i really wish that 3sx and dr, and ips and all would actually produce some nice cams for the sohc. *HINT HINT HINT* thats what really holds them back, as brent has already found out on his turbo sohc. but hey, maybe once enough people can see that that it really doesnt cost that much to make the kits, they'll just do it themselves and all the performance shops that could have put their names on the map with sohc parts, will have just lost all the money that they could have made.

[gipper72488]

well just wanted to update and say that i picked up my injectors and boost gauge today. may be getting an safc thursday. im debating between that or if i want to go ahead and get the manifolds and start fabbing

[983KGTNA]

yeah deal with the turbo fell through but i have my injectors and turbo timer and gauges will be here this week. I am prolly going to pick up an extra motor as well to do the fabbing of the headers and shit on so that way it wouls be a little easier. Will hopefully find another turbo here within a couple weeks and then the boosting will begin. Once that starts I will begin to post pictures.