skirkland1980 Posted July 16, 2016 Share Posted July 16, 2016 Hey Bernardd. What were the specs on that cam? Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted July 16, 2016 Share Posted July 16, 2016 And valve springs...Thanks! Quote Link to comment Share on other sites More sharing options...
Tony D Posted July 16, 2016 Share Posted July 16, 2016 "Elgin Super-Secret Mystery Grind" LOL Jeff did a nice writeup on the porting of his stocker. Once it was revealed it was cast steel and could be welded up, the fear of cutting through anyplace, or being too thin was easily solved with his MIG...Turned out nice for a guy doing secret work in the garage where nobody was supposed to work on their cars! It was like getting into a speakeasy back in the day. "Knock Knock" (Little drilled hole opens to reveal an eyeball) "That you? Anybody else around out there?" No (door creaks up) "Hurry, get inside, I'm not supposed to be working on my car in here!" Quote Link to comment Share on other sites More sharing options...
TimO Posted July 16, 2016 Share Posted July 16, 2016 John, These guys http://www.lonewolfp....com/prices.htm also have a service they don't show on their website where they cut the manifold in half, port it, and weld it back together which I understand results in a much better flow than the "standard" porting. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted July 28, 2016 Share Posted July 28, 2016 TimO: Is that for the exhaust manifold? I can see them doing the intake... TonyD: Is there a link to the writeup JeffP did for the stock exhaust manifold? I couldn'see it on his website. Thanks, Brad Quote Link to comment Share on other sites More sharing options...
TimO Posted July 28, 2016 Share Posted July 28, 2016 Exhaust manifold. Hard to find on their website. Go to their prices page and you will see it under Manifold Porting. http://www.lonewolfperformance.com/index.htm Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted July 28, 2016 Share Posted July 28, 2016 I saw the porting for the exhaust manifold already, I was wondering about the cutting open and welding like they say they can do on the intake manifold. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted July 28, 2016 Author Share Posted July 28, 2016 FWIW, I called and left a message at Lonewolf but have yet to get a return call. Quote Link to comment Share on other sites More sharing options...
JelmerPatrol Posted August 6, 2016 Share Posted August 6, 2016 Sounds like you guys need a euro turbo manifold! Quote Link to comment Share on other sites More sharing options...
rossman Posted August 7, 2016 Share Posted August 7, 2016 Is there a link to the writeup JeffP did for the stock exhaust manifold? http://www.angelfire.com/extreme/280zxt/page11.html Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted August 8, 2016 Share Posted August 8, 2016 (edited) Thanks Rossman. I saw that page but wondered about what he did for the area from ports 1-4 coming into the plenum. There was absolutely no mention of smoothing or enlarging which is why I thought I may have miss3d a page... Edited August 8, 2016 by Brad-ManQ45 Quote Link to comment Share on other sites More sharing options...
kubus Posted August 28, 2016 Share Posted August 28, 2016 i know this one is out of the league..... just wondering if a stock L28E ..... will cooperate with a GT30 on 0.82ar ?? going standalone on a fairly stock L28E ( internally - just for now ( low boost ) ) - and thinking if it's gonna spool fine on that ar size ?? any tips would be cool. cheers guys. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted August 28, 2016 Share Posted August 28, 2016 I may be wrong, but I believe the .82 on the 30 series is pretty much the equivalent of the .63 on the 35 series as far as flow goes. It's been a while since I looked at the maps for the housings... Quote Link to comment Share on other sites More sharing options...
TimZ Posted August 31, 2016 Share Posted August 31, 2016 Has anybody but Jeff done the exhaust manifold pressure checks? My understanding is some of the new Diesels have an exhaust pressure sensor available, and if this is true, I can see adding that to a logging channel, or monitoring it with the EMS will pay dividends in the black art of turbine sizing. Okay, this is a bit late, but search ebay for "Powerstroke Exhaust Back Pressure Sensor" or "Powerstroke EBP". They have approximately a 3.5 bar range, from 34kPa at 0 Volts to 390kPa at 5 Volts. I'm currently using one for both instrumenting my Turbine Inlet Pressure, and another as my MAP sensor. Works great as a MAP since I don't pull much vacuum at idle anyway, and it gives me roughly the same boost capacity with better resolution than a 4bar sensor! Quote Link to comment Share on other sites More sharing options...
Tony D Posted September 6, 2016 Share Posted September 6, 2016 Ohhh, that's a nice tip TZ! Thanks... Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted September 11, 2016 Share Posted September 11, 2016 (edited) A long and skiny tube to a standard map sensor works as long as you don't have a leak near the sensor. You do have to pick where you are porting the sensor carefully so you don't get problems with venturi effect causing low readings. If you want to go all out, get a DLP solutions I08 and datalog 8 channels in nistune. Edited September 11, 2016 by HowlerMonkey Quote Link to comment Share on other sites More sharing options...
TimZ Posted September 12, 2016 Share Posted September 12, 2016 A long and skiny tube to a standard map sensor works as long as you don't have a leak near the sensor. You do have to pick where you are porting the sensor carefully so you don't get problems with venturi effect causing low readings. If you want to go all out, get a DLP solutions I08 and datalog 8 channels in nistune. I used a piece of brake line tubing for this same purpose with my EBP. I believe they do something similar in production. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted March 11, 2019 Author Share Posted March 11, 2019 (edited) I know this is a very old post but I thought I'd add some new data. I finally dusted the cobwebs off the Z and did some back pressure testing. I changed to a new GTX3576R Gen I as stated above but went with a .63 turbine because I made 455whp in the past with a .63 and didn't want to sacrifice driveability. The new turbo couldn't muster more than 402whp which was disappointed to say the least. I have a custom adapter between my exhaust manifold and the turbo that I tapped for the back pressure fitting. I hooked up a DynoJet sensor on my intake and one on the newly tapped turbo adapter using a brake line as TimZ suggested. At 23.4psi gauge (262.75kpa) I was getting 33.78psi (334.29kpa) at the turbine inlet. The pressures started diverging at 3500rpm and got worse all the way to readline. In the end, I had 10psi worth of back pressure. WOW! I have ordered a new .82 turbine housing since that is the only possible restriction. My 3" mandrel exhaust is the same as before. One interesting side note. The GTX35 series turbos from Garret all have the exact same turbine wheel as mine and claim to support up to 1000hp (GTX3584R) The .63 turbine must be for a much different engine because it didn't work well for me. Also, the compressor on the GTX3576R must be moving a ton more air at lower boost vs my old t3/t4 hybrid to create such a restriction. The old L6 is flowing better than I thought. I hope to get back to the 450ish whp with the new turbine. I have seen the EVO and Subie crowd get almost 600whp with my turbo so 450-500 whp should be doable with the MUCH less efficient L6. Stay tuned.. Edited March 11, 2019 by jgkurz Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.