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Thread: "SR20DE RR + JWT S3Rs+SR16VE pistons+cam gears" set up

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Posts: 11-20 of 24
2014-07-18 05:15:01
#11
Not really failing as much as just tired after nearly 20 years. It was fine with a stock setup, the cams and better breathing mods just need more juice.

2014-07-18 10:04:57
#12
Originally Posted by happynole
Testing today, results show I need a new fuel pump. More to come soon.

That dyno - is it from low port engine?
Excuses, but I'm not aware of your setup.
2014-07-18 17:48:14
#13
USDM SR20DE Roller Rocker
- Head and bottom end is 100% stock, it has never been apart
- Custom intake fabricated by a friend - It's a stock VE intake manifold with the lowport DE water jacket welded on and mounting bolt holes adjusted so it is a straight bolt on affair. I am using the stock DE tb with this so that I can keep cruise. Also using the VE intake tube and a JWT popcharger on the stock maf.


- JWT S3R cams and VE dual valve springs, seats, and retainers.


- Custom equal length header (seen above), stock cat, and mandrel bent 2.5" catback exhaust.




After thinking about your idea regarding cam gears and much discussion with knowledgeable builders I am going to try adjusting them after I get the fuel situation squared away. I have a set of Custom Steel +8/-8cam gears. I'm going to start with moving exhaust to -4 and go from there. The thoughts are that I will play with exhaust first and then try adjusting intake. I will of course post results once they are in.
2014-07-19 21:34:57
#14
What happened to your engine? I thought it was a non-RR and had bigger cams , 3" and made like 179whp? This must be another motor?

Evan



Originally Posted by happynole
USDM SR20DE Roller Rocker
- Head and bottom end is 100% stock, it has never been apart
- Custom intake fabricated by a friend - It's a stock VE intake manifold with the lowport DE water jacket welded on and mounting bolt holes adjusted so it is a straight bolt on affair. I am using the stock DE tb with this so that I can keep cruise. Also using the VE intake tube and a JWT popcharger on the stock maf.


- JWT S3R cams and VE dual valve springs, seats, and retainers.


- Custom equal length header (seen above), stock cat, and mandrel bent 2.5" catback exhaust.




After thinking about your idea regarding cam gears and much discussion with knowledgeable builders I am going to try adjusting them after I get the fuel situation squared away. I have a set of Custom Steel +8/-8cam gears. I'm going to start with moving exhaust to -4 and go from there. The thoughts are that I will play with exhaust first and then try adjusting intake. I will of course post results once they are in.
2014-07-20 20:39:24
#15
You are thinking of Panda, my other P10. It had a built DE, SR16 pistons, C3 cams, and the intake and exhaust now on Black Gee. Panda spun the mains last year and is undergoing a VE transplant.
2014-07-20 21:22:15
#16
Originally Posted by happynole
You are thinking of Panda, my other P10. It had a built DE, SR16 pistons, C3 cams, and the intake and exhaust now on Black Gee. Panda spun the mains last year and is undergoing a VE transplant.


Sorry to hear that about the motor BUT didn't it spin a rod while on the dyno being tuned and you had to get a new block?

Get a 3" exhaust on that bad boy! don't bother with that 2.5"
2014-07-21 00:18:29
#17
2.5 is plenty for Black Gee, and she is a daily driver. Panda is having a 3" built as we speak so the VE can breath deep

Don't know exactly when I spun the mains, but it manifested itself last year during the convention weekend when I couldn't keep any oil pressure.
2014-07-22 21:04:58
#18
"SR20DE RR + JWT S3Rs+SR16VE pistons+cam gears" set up
Any thoughts on why your down 40whp vs your old DE build? Think the head porting and S3 vs S4 cams are it?


Sent from my iPhone using Tapatalk
2014-07-22 23:01:22
#19
Originally Posted by Haulin200sx
Any thoughts on why your down 40whp vs your old DE build? Think the head porting and S3 vs S4 cams are it?
Sent from my iPhone using Tapatalk

Several factors IMHO are the reasons:
- better ecu vs stock ecu
- SR16 pistons so significant compression boost
- C3 are a lot bigger than S3R cams
- ported head
- better header
- new fuel pump vs 20 year old so afr's were controlled properly

I think better fueling and some basic tuning are worth at least 10 hp and a significant bump in torque.
Last edited by happynole on 2014-07-22 at 23-06-24. Reason: added comments
2014-07-29 11:44:14
#20
Turns out I was right, sort of.....


I did a double fuel pump switcheroo. Panda had a new Walbro 190 installed a little over a year ago. I bought a new Walbro 255 and swapped it into Panda, and replaced Black Gee's 20 year old original with the 190. Didn't gain a lot in peak numbers, but picked up gains you can absolutely feel across the mid range.


After careful consideration, I am going to call this a stopping point. The next logical step would be better engine management (still running stock ecu) to smooth out what I already have. I am currently running regular fuel, so there is likely room to bump timing some more if I run premium.

I keep reminding myself this is a daily driver. As it is Black Gee is peppy and fun to drive on cheap old regular unleaded, and I can go all crazy with the Panda build.
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