New dyno after 3.5 swap
#1
Supporting Maxima.org Member
Thread Starter
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
New dyno after 3.5 swap
Here are the new numbers. The graph shows my best 3.0 dyno versus the new 3.5 dyno. The low range torque is low I believe because of the high lift cams and lack of variable cam timing. Also I disabled the 2k2 variable intake manifold which hurts low end some also. The 2k2 manifold definately doesn't hold power like a MEVI at high rpm, even with the cams.
Changes since last dyno (shown):
VQ35DE engine with VQ30 timing equipment (no variable cam timing)
JWT VQ35DE knockoff cams (260 duration, 10.9mm lift)
additional power mods:
JWT VQ30DE ECU with 7000 rpm redline
SAFC-II (tuned to 13:1)
JWT short ram intake
70mm ported pathfinder TB
Cattman headers
2.5 inch test pipe with 2.5 cutout
2.5 inch exhaust(dyno numbers posted will be open cutout)
Changes since last dyno (shown):
VQ35DE engine with VQ30 timing equipment (no variable cam timing)
JWT VQ35DE knockoff cams (260 duration, 10.9mm lift)
additional power mods:
JWT VQ30DE ECU with 7000 rpm redline
SAFC-II (tuned to 13:1)
JWT short ram intake
70mm ported pathfinder TB
Cattman headers
2.5 inch test pipe with 2.5 cutout
2.5 inch exhaust(dyno numbers posted will be open cutout)
#3
holy hell those are some sick #'s.
I believe that is about where Jay25 was when he had supercharged his max for the first go around. (same dyno btw)
I predict a 13.2@106 at Steele
let me know when you are going
I believe that is about where Jay25 was when he had supercharged his max for the first go around. (same dyno btw)
I predict a 13.2@106 at Steele
let me know when you are going
#6
Originally Posted by zack342
DAMN DAMN DAMN your well over 300whp at the crank. Hell i think your doing better than most of the guys with 3.5's in their car from the factory
There is no such thing as whp at the crank.
Usually a modified engine produces more power than a stock factory engine
#7
Originally Posted by Nismo3112
There is no such thing as whp at the crank.
Usually a modified engine produces more power than a stock factory engine
Usually a modified engine produces more power than a stock factory engine
I thought guys with modded 3.5's was implied. I thought Sr20DEn was t he highest at like 269whp or something?
#8
Originally Posted by 96sleeper
additional power mods:
JWT VQ30DE ECU with 7000 rpm redline
SAFC-II (tuned to 13:1)
JWT short ram intake
70mm ported pathfinder TB
Cattman headers
2.5 inch test pipe with 2.5 cutout
2.5 inch exhaust(dyno numbers posted will be open cutout)
JWT VQ30DE ECU with 7000 rpm redline
SAFC-II (tuned to 13:1)
JWT short ram intake
70mm ported pathfinder TB
Cattman headers
2.5 inch test pipe with 2.5 cutout
2.5 inch exhaust(dyno numbers posted will be open cutout)
and did you have any problems tuning w/ the AFC along w/ the JWT ecu? I've heard people have problems because of JWT's maps.
#17
Originally Posted by chris'smax
looks good, are you still using stock valve springs?
#18
Originally Posted by SR-71 Blackbird
You're supposed to use the stock valve springs with those cams. There's really no reason to get stiffer valve springs since the VQ35 can't rev very high anyways. Even if you get upgraded rod bolts, I believe the maximum you want to take a VQ35 to would be 7200-7500rpm which wouldn't be enough to introduce valve float. I think there's some people running the VQ30 at 8000rpm with the stock valve springs.
welll i was wondering since i am running nismo cams in mine and i may want to increase the rev limit using EU down the road
#19
Supporting Maxima.org Member
Thread Starter
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
Originally Posted by chris'smax
looks good, are you still using stock valve springs?
I knew I would not be revving very high with this engine. It just doesn't like it near as much as the old 3.0. Technosquare increases the 350z revlimit to 7100rpm, so I figured I would be fine at a maximum of 7000rpm. I don't suspect the valve springs with last 200k mikes with that much lift from the cams, but it ought to be fine for a long time.
nice numbers! If you get a 350z IM, you'll probably dyno higher than SR20DEN.
My dyno numbers include full accessories. I did not remove power steering or A/C when I did the swap. I kept the same spark plugs that were in the engine when I got it from the junkyard. I just wanted to go and get it tuned since I knew I was running rich. I did not go just for numbers to brag about.
#20
Originally Posted by SR-71 Blackbird
You're supposed to use the stock valve springs with those cams.
There's really no reason to get stiffer valve springs since the VQ35 can't rev very high anyways. Even if you get upgraded rod bolts, I believe the maximum you want to take a VQ35 to would be 7200-7500rpm which wouldn't be enough to introduce valve float. I think there's some people running the VQ30 at 8000rpm with the stock valve springs.
#21
Supporting Maxima.org Member
Thread Starter
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
Originally Posted by nismology
No you're not. These are a knock-off of the JWT S1 cams and they recommend upgrading the valvesprings.
Actually I talked to JWT, and this is straight off their website:
Includes 24 springs and shims for use with JWT race cams or JWT street cams with rev. limit raised above 7000 rpm
#22
Originally Posted by 96sleeper
Actually I talked to JWT, and this is straight off their website:
They said I did not need to replace the valve springs with my rev-limit at 7000rpm.
They said I did not need to replace the valve springs with my rev-limit at 7000rpm.
#23
http://cgi.ebay.com/ebaymotors/CAMS-...spagenameZWDVW
Here's the ebay listing for these cams. It specifically says not upgrade the valve springs.
Here's the ebay listing for these cams. It specifically says not upgrade the valve springs.
#24
Originally Posted by SR-71 Blackbird
http://cgi.ebay.com/ebaymotors/CAMS-...spagenameZWDVW
Here's the ebay listing for these cams. It specifically says not upgrade the valve springs.
Here's the ebay listing for these cams. It specifically says not upgrade the valve springs.
#25
Supporting Maxima.org Member
Thread Starter
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
Originally Posted by SR-71 Blackbird
http://cgi.ebay.com/ebaymotors/CAMS-...spagenameZWDVW
Here's the ebay listing for these cams. It specifically says not upgrade the valve springs.
Here's the ebay listing for these cams. It specifically says not upgrade the valve springs.
I think what it means is that the listed cold valve lash range is required to use stock valve springs and it is written like they are two separate lines.
#31
Originally Posted by JClaw
SR20DEN trapped 108 mph at 3150 lbs raceweight (with him in it). He had 263whp.
How much does your car weigh?
Easy 12's on slicks. Emphasis on "easy".
How much does your car weigh?
Easy 12's on slicks. Emphasis on "easy".
#32
Supporting Maxima.org Member
Thread Starter
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
I really don't want to speculate since I haven't been to the track yet, and I might not even make it before it gets way too hot, but cartest shows me being able to hit a 12.99 on a 2.03 60 ft time. Cartest was right on before, but that just seems hard to beleive to me.
#33
Originally Posted by 96sleeper
I really don't want to speculate since I haven't been to the track yet, and I might not even make it before it gets way too hot, but cartest shows me being able to hit a 12.99 on a 2.03 60 ft time. Cartest was right on before, but that just seems hard to beleive to me.
#34
Originally Posted by 96sleeper
I really don't want to speculate since I haven't been to the track yet, and I might not even make it before it gets way too hot, but cartest shows me being able to hit a 12.99 on a 2.03 60 ft time. Cartest was right on before, but that just seems hard to beleive to me.
#35
Supporting Maxima.org Member
Thread Starter
iTrader: (4)
Join Date: Nov 2000
Location: Chattanooga, TN
Posts: 1,756
I only have street tires. I have a buddy with 255/50-16 ET street radials on 16 inch mazda rx-7 wheels, if they will fit.
If I ever meet up with Elon (6spd_hayes) at the track, he has drag radials as well.
If I am close on street tires, I will make sure it happens somehow.
If I ever meet up with Elon (6spd_hayes) at the track, he has drag radials as well.
If I am close on street tires, I will make sure it happens somehow.
#36
Supporting Maxima.org Member
iTrader: (17)
Join Date: Aug 2004
Location: Montreal, Qc, Canada
Posts: 5,437
Well if you ever get slicks, take it from me; get big ones. It got so old to spin 3/4 of the time with the 23's, do yourself a favor and go for 26's or 24.5's right away if you decide to get slicks.
Thread
Thread Starter
Forum
Replies
Last Post
jmlee44
4th Generation Maxima (1995-1999)
8
10-02-2022 02:13 PM
TallTom
5th Generation Maxima (2000-2003)
50
07-08-2022 09:54 AM
HerpDerp1919
3rd Generation Maxima (1989-1994)
2
09-29-2015 02:02 PM