sohc turbo dyno numbers?

Boosted22sxt · Post by **Boosted22sxt** » Tue Feb 19, 2013 11:09 pm

id like to know what some of your experiences have been. post a picture if available. i searched on the .org but so many of the pictures are lost.....

cogs1212 · Post by **cogs1212** » Wed Feb 20, 2013 3:32 pm

Im currently making 315 whp and 335 tq

2004 R/T sohc super 16g turbo with 21 psi

here is the graph
viewtopic.php?t=57510&start=150

Boosted22sxt · Post by **Boosted22sxt** » Wed Feb 20, 2013 7:15 pm

What are your afrs and what else is done to the engine? Also what is your tuning device along with what is you're timing retard per pound of boost?

cogs1212 · Post by **cogs1212** » Thu Feb 21, 2013 1:54 pm

afr is 11.7

The engine if fully rebuilt. Crower rods, je pistions, 9.3 comp., bored .02 over, magnum head with .02 oversized indy valves, magnum cam, 750cc injectors, fuel return line, sidewinder intercooler, and n2mb boost box

Tuning is done with the diablosport predator (installed a srt-4 pcm) with a custom tune to work on 2.0L rather than 2.4L

Boosted22sxt · Post by **Boosted22sxt** » Thu Feb 21, 2013 3:44 pm

Wow I was hoping to see a stock bottom end... but I guess at 21 psi it wouldn't live forever. Very nice.... are you happy with that number? Any plans for bigger turbo? Maybe s20g? Or bigger.

cogs1212 · Post by **cogs1212** » Thu Feb 21, 2013 5:29 pm

My last set up was the stage 2 hahn turbo kit.

afr was around 11.7 again controlled by the splitsec box. It controlled 4 extra injectors for the added fuel

I had the FTC-1 to retard the timing.

I had around 12 psi and it made 220 whp to the wheels but the r/t pcm was fighting everystep of the way. (the r/t pcm has a more aggressive timing if you didnt already know)

That was all on a stock bottom end 9.8:1 ratio but unfortunely it blew on me. (blew the piston ring and cracked part of the piston head)

It lasted 4 or so years so i was happy

as for future plans...

I am currently installing a BW 256 big turbo and agp external WG and all the goodies that go with it. I am looking to either keep my current hp but have lower boost or maybe crank it up a little and hit 400+ to the wheels...

this is my DD so I cant go too crazy

The tune is very safe and i shouldnt break anything...fingers crossed

INVUJerry · Post by **INVUJerry** » Thu Feb 21, 2013 7:48 pm

Boostalot, if you run low timing, or do water/meth injection and change the rod bolts out for ARP's, you'd have a better chance of keeping the bottom end together.

gtownv6 · Post by **gtownv6** » Thu Feb 21, 2013 9:26 pm

Made 240 whp on 8 psi with an ebay turbo, engine itself was stock from the valve cover to the oil pan with about 180k on it. Tuned with a begi rrfpr and 30lb injectors.

Boosted22sxt · Post by **Boosted22sxt** » Thu Feb 21, 2013 9:33 pm

wow! thats awsome... what size ebay turbo? bigger or smaller than s20g?

gtownv6 · Post by **gtownv6** » Thu Feb 21, 2013 9:48 pm

it was like a .50 ar piece o crap

Boosted22sxt · Post by **Boosted22sxt** » Thu Feb 21, 2013 10:02 pm

simply awsome.. whats your current setup? also are those universal mudflaps?

gtownv6 · Post by **gtownv6** » Fri Feb 22, 2013 1:21 am

Now I'm srt swapped, was big turbo, now back to stock turbo. Yea, they're rallyarmor flaps

Arro · Post by **Arro** » Fri Feb 22, 2013 6:14 pm

I would think anything more than a small turbo on a stock SOHC engine would be overkill. 20G anything is big.

Boosted22sxt · Post by **Boosted22sxt** » Sat Feb 23, 2013 1:06 am

im gonna stick with my 20g and have it modified by blouch performance turbo.... the owner and i had a hour conversation about the s20g. if you compare inducer and exducer measurements vs the bws256.... he explained to me the 20g isnt much smaller... and after my 20g is modded it will be a tad larger than the s256..... they specialize in mitsubishi turbos and garret. they just completed a sick ass challenger turbo..

Arro · Post by **Arro** » Sat Feb 23, 2013 1:54 am

And you're expecting to use that on a stock longblock?

Good luck. Just sayin.

Boosted22sxt · Post by **Boosted22sxt** » Sat Feb 23, 2013 9:53 am

No I have a built motor lol but it wouldn't hurt a stock block. Bigger turbos are easier on a stock motor because they don't create insta spool torque like an srt4 Turbo or s16g.

INVUJerry · Post by **INVUJerry** » Sat Feb 23, 2013 11:35 am

Arro wrote:And you're expecting to use that on a stock longblock?

Good luck. Just sayin.

There was a guy over on neons.org making huge HP with a stock 98 dohc block. He had a big turbo(sc61) and crane 18's. made 312HP/260wtq. He had upgraded his rod bolts to arps and was using water/meth injection and Megasquirt. If you can keep the power from coming on too early and rev high it'll last a while.

http://forums.neons.org/viewtopic.php?f ... o&start=40

My plan I had years ago was to use a sohc block, dohc head, semi big cams and a big turbo for a drag car. I figure 11's would be easy if the car was a beer can. Even a big cam sohc would be fun. We'll see.

Glasswars is using a bws256 on his stock rt motor at 8psi and has been okay. Don't know if he ever dynod it though.

Hudson_Neon · Post by **Hudson_Neon** » Fri Feb 07, 2014 10:34 am

i have a 256NET and last put down 330whp, unknown torque due to their pickup being wacked.