CJM 370z had boost envy, problem solved...

phunk

Just over 3 years and ~40,000 miles ago, I did my turbo install and tune. I made something like 524rwhp at 8psi. Plenty for the time being.

August 2013 I gave it another psi of boost and some more timing, and it made 586rwhp at 9.1 psi.

It really was plenty for this car. I daily drive this car. Admittedly... not as much this year because I bought a motorcycle a couple months ago and have been really enjoying it. However, the 370z is still my ONLY CAR so ya it gets driven regularly.

Well anyway... I kept seeing all you guys around here putting like 12 - 14 psi into your cars now. It really got me thinking - "what would my old lady do with 12 psi of boost?"

So tonight I went to find out.

671 RWHP
520 TQ
12.1 PSI BOOST - E85

100% Stock Engine - untouched
Greddy Twin 20G Turbo Kit w/ CJM modified wastegate setup
CJM S2SE Fuel System w/ Walbro 400 pump & ID1000cc Injectors
Greddy Dual 2.75" Exhaust
OS Giken Twin Clutch w/ RJM Pedal and Z Spd CSC
UpRev tuned by me - the only UpRev and the only E85 car I have ever tuned... so theres room for improvement!
HKS EVC6 Boost Controller
OEM GT-R Spark Plugs

I think that is everything I have done that is related to HP.

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phunk

I almost stopped a little sooner. When I got up to 11.7psi it made 651rwhp and I said thats good enough. But then I could of swore I recalled someone already doing 650? Or am I wrong?

So I thought it made sense to take another step. In this graph picture you can see that it looks like my throttles are perhaps starting to shut early. I havent touched the throttle maps yet. Maybe I will mess with that and see if I can get the power to keep hanging on to redline.

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faceglide

I'm telling you my friend.....these engines are oodles more stout than anyone thinks, just gotta do it right! Your fuel system has not let me down yet and is a common link between our monsters... Coincidence? I think not!

The Greddy kit has always been top notch, with good fuel and someone smart behind the tune, this is not going to be a rarity! With those slicks, it's gonna be hard to beat on the strip.

First to 700hp(stock block!) gets a medal!

Grats my friend! I am just glad to see you are still in love with the 370!(and not driving a GTR like you were considering!) I cannot wait to hear your drag strip experience!

faceglide

Oh and time to update your sig! haha!

phunk

Ya I have some people pushing me to go for 700rwhp. I might... but first I would like to get a couple passes out of it yet. Maybe in the next couple weeks I will strap it back down.

BTW my 28" tires are still drag radials! They just look like slicks because I got 28" tall and 15" wheels lol. They wont hook like a slick but I am on stock axles and "only" 670rwhp, so it should be plenty of tire for me!

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roplusbee

Man Charles............I need to get on the bus and get that fuel system stat. 671 RWHP.....like OMG! I will contact you soon about the box of parts that I will be ordering soon.

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2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL

phunk

Join us! Make those 20g's sing, man! They may not come on as hard and make the big torque #'s... but they come on smooth, which you can argue helps traction... and they unleash their fury on the top end. I bet you can hit 725rwhp by 1 bar boost!

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roplusbee

1 bar is actually the boost pressure goal that I would like to settle on once I have the fuel system and manifold/plenum installed. I would love to run 700 RWHP, but I know that I need motor build and a few drivetrain adjustments to support my driving habits so that I can keep from breaking things, lol.

I am serious about ordering a box of goodies from you Feb/Mar 2015 at the latest. I am holding out for the CJM intake plenum though!

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2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL

GaleForce

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esfourteen

thats also going to help the longevity of the stock rods for sure, GTR guys can get their rods (which look similar to ours) to bend around 550-600tq. those who know this seem to remove timing/boost from the low end and ramp up the tq from there.

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Build Thread | GTM TT Install Thread | Engine Build Thread

swiss370Z

2009 370z, Twin Turbo, E85. 671rwhp @ 12 psi - STOCK ENGINE!!!

AMAZING SIR

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/// ONE LAST RIDE /// R.I.P. FAIRLADY Z ///

phunk

I've had a gopro sitting in a shoebox for years. I charged it up this morning and read the instructions lol. Maybe I'll be able to capture some footage

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phunk

I agree on torque and rod happiness.

But let's not talk about rods... If I just ignore the concern, everything should be ok!

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theDreamer

Very impressive phunk!

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theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

theDreamer

Phunk, going through today and updating the finished builds thread with new numbers for people and a few new additions.
You have taken the crown for top stock internal engine. DJtood is pushing 658 right now (13.4PSI), and over 5 known builds that are above 600whp with stock internals.

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theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram