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tomei 260 vs 270 sla in sr20det


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#1 69sroadster

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Posted 31 August 2013 - 12:25 PM

I may finally have some more cash again to work on the sr20det mods.  Nobody seems to have any real tech data concerning the powerband shift when switching to the tomei 260 solid lifter cam assembly or the 270 cams.  Anyone on here have some dyno backed data other than the standard conjectures?  I'm tired of the bench racers personally in the SR crowd online.

 

Sam


If you're not breaking things then you're probably not having enough fun.
2006 Buick Rendezvous family hauler
1979 Fairlady 280ZX 2+2 SR20DET daily driver/SCCA cone crusher
1969 2000 Roadster future project

#2 emoximuu

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Posted 31 August 2013 - 01:33 PM

http://zilvia.net/f/...s-sr-motor.html

 

Check out this thread in regards to SR motors. If I decide to do a SR again this will be the general build I look at.



#3 69sroadster

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Posted 05 September 2013 - 03:31 PM

There was some good info on there for the GT2871R and similar turbo.  I'm going to replace my aging T25 with a top mount twin scroll EFR 6758.  It seems like the solid 270 may be a better fit.


If you're not breaking things then you're probably not having enough fun.
2006 Buick Rendezvous family hauler
1979 Fairlady 280ZX 2+2 SR20DET daily driver/SCCA cone crusher
1969 2000 Roadster future project

#4 69sroadster

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Posted 13 April 2014 - 06:59 PM

Not sure anymore if I can get the twinscroll 6758, but don't care too much anymore about that.  Once I get my PFC tuning done, I'll repost what the results were from changing over to the solid lifters, bee-hive springs, bronze guides, tomei 260's and titanium retainers.  It's killing me right now staying off the boost pedal, but I don't want to detonate on a leaned out motor.


If you're not breaking things then you're probably not having enough fun.
2006 Buick Rendezvous family hauler
1979 Fairlady 280ZX 2+2 SR20DET daily driver/SCCA cone crusher
1969 2000 Roadster future project

#5 CasperIV

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Posted 14 April 2014 - 12:20 PM

I'm looking to go EFR as later this year after I get the basic package tested and any other bugs worked out. Right now I think I'm going to go with parts from Full Race, a Haltech, etc. I was looking at cams and the last ones I was planning to look into when the upgrades start are the Jim Wolf 260 S3s... but really it will depend if I am staying true to a small turbo plan or if I end up going bigger. With the gain in response of the EFRs I have a feeling I might go somewhat larger than I would with a traditional turbo option, which may also make me want to look at something 270 or so.

 

Have you played with any SRs with EFR turbos?


Life Lesson: Those who yell the loudest rarely have anything important to say... unless their hand is closed in your door.

http://www.sr240z.net/


#6 69sroadster

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Posted 26 October 2014 - 08:21 PM

Not yet with the EFR's but I would love to.  I need to get my SR to a dyno to see what difference the move to the solid lifters and 260's did for another baseline.  I'm still running the stock ECU and injectors for now after realizing I didn't have the time to learn the Datalogit tuning software on the PFC.  I had some drama after trying out the 550 injectors for a bit when one of the lower seals started to get pinched and dump fuel.  I fixed it all and put the original injectors back in for the time being.


If you're not breaking things then you're probably not having enough fun.
2006 Buick Rendezvous family hauler
1979 Fairlady 280ZX 2+2 SR20DET daily driver/SCCA cone crusher
1969 2000 Roadster future project




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