Mine is Dynojet, but Beast from the East wants to compare his findings to mine and his are Dynapak, we dont know how they compare. Thats why I was asking if anyone knows how they compare to eachother

STEPHEN

 

Dynojet Model 224 Chassis Dyno.

They are about 5 minutes from my house.

 

Man, this thread is going bezerk..........

 

Stephen,
It looks very good!!! We figured that your dyno# should be in the 410ish based on my butt dyno so the dyno chart confirms on what we estimated. Try to change your timing and a/f ratio to what we talked about and you should be able to sqeeze another 10-20rwhp on top of what you have. Congrats!

Steve K

www.gothamracing.com

 

congrats Stephen

awesome numbers for what is basically simple bolt on mods

 

whew!........ no long quotes from the bible......... I got worried when YZF-R1 replied and my email popped up the link........

 

Take it over to our 'end of days' thread - stay on target here. Anybody have a definitive dyno comparison between dynapack and dynojet?

Beast

 

I heard that the dynopack #'s are approximately 18-20% less than the dynojet #. I could be wrong though.

You can call them to find out....

 

lol

 

i dont know if i would call a streetport/turboupgrade/fuelsystem/and tuning of an ecu...Simple Bolt On Upgrades.

hahah...doing uprades like this is not an easy task at all. Look at how long it took for someone with twins to break 400rwhp. A LONG TIME. There are a handful of cars lined up to do it again too...but for those of us who are attempting to do it it was a lot more then just putting some different parts on the car.

out of the six or eight guys running upgraded twins on the forums that I am aware of this is the first full success. simple it is not.


jason

 

Yea, the hardest part by far is the tuning....there are only a handfull of people in the states that are worth a damn for tuning a high hp rotary. The tuning will make more difference than ANYTHING else you can do to your car

The rest of it is just buying/installing parts.

STEPHEN

 

Nice numbers Stephen!!

Where are all the people that called BS on the other thread???

 

See, Steve, there's the rub (btw, we met last year at the cmi meet in Sac). If there is a 20% difference, then my 330.6 dynapack = 413.25 on a dynojet (403.17 using 18%). Was I the first to break 400 rwhp based on that? I don't think that's a claim I can make, unless there's some sort of definitive conversion that can be used. I don't know of one, therefore SPO is the first that I know of.

I guess I'll just have to find a dynojet here in Sac and do a run on it to compare.

Here was my untuned dyno on the dynapack as comparison (along with every other run I did over the years - each mod is a different color). I've posted it on another thread but since this is devoted to hybrid twin dyno sheets we might as well add it.

EDIT: the damn server is running slow right now and won't load, so here's the link to where I posted it:

https://www.rx7club.com/forum/showth...5&pagenumber=3

 

Congrats Stephen! You guys really pulled through. That is one heck of a chart - I can see how you have "NO LAG" - withclipped turbines you'll have had some lag but more hp up top. I started talking to Bryan when he was working for Turbo Specialties almost a year ago. He said one guy had 386 rwhp at 15 psi with his old Stage 2s (sequential - no clip) but no dyno sheet. I was sold from then on. KDR is trying to locate a rear-end for me as this seems to be my weird rwhp problem - should know some figures soon. You have one heck of a powerband though! Incredible!

 

Yea, I dont know how all that **** works....I mean Dynomite told me they are 15% less than Dynojet but when I take thier numbers and convert them it put me up to 465!!! Thats why I just decided to not worry about that dyno and find a Dynojet so people could more easily compare.

BTW - If you go to Dynojet.com they have a place in there you can type you zip code and pull up every dyno remotly close to you. I found a bunch in Atlanta I didnt know existed.

Have you been to the track yet? I think I'll be in the low mid 120mph.....like 121-124ish. Back in the day with intake, full exhaust, base map PFC I ran a 12.3 @ 113 and I know my car is WAAAYYYYY faster now. I want to go to the strip but I'm worried about my rear end busting....I have no money to fix it right now, we are buying a house.

STEPHEN

 

I have added your dyno to my dyno page at

http://www.catenet.net/dyno.php

One quick question just to be sure... your mods list you said you're running 1.14 PSI boost... you mean 1.14 Bar right?

That works out to around 17 PSI (with rounding) so that is what I put on my page for your boost. OK?

Brian

 

yea, thats fine

 

http://www.dynojet.com/lauto.shtml

 

spo, are you gonna be running this much boost on the street?

 

Yea...what's that like running 400hp from stoplight to stoplight? Is it manageable?

 

Great numbers. Gosh...my single vs twins battle just got alot more complex. Those things realy go! CJ

 

SPO - can you supply afr readings and gas type, too?

I'm on a stock port - I gotta port the motor next time <sigh>

I don't know about 120mph - that's close to Steve Kan's numbers. The best I got was 111mph before tuning, and I have not been back since (but Feb is right around the corner, and the track will reopen). I was on steet tires and spun 1st and 2nd pretty badly. I also was getting really 'peaky' turbo engagement (hence my low torque numbers) and I've done some timing changes to improve that quite a bit. My turbos are now at full boost by 4.8k rpm vs. 5.2K, and it makes a big difference.

I also need a three-bar so I can run 17 lbs of boost - my numbers were at 16 lbs with 10:1 afrs (or less). Poor thing was falling on its face (notice the breakup at just past 6K rpm - that was when it went below 10 to 1 afr). I'm in the mid to high 10 to 1 ratio now - much much better.

How soon before you can get to a track?

Beast

 

Nah, HIs car should be good for around 122-125mph trap on pump gas at 17psi. I ran 122mph with pump gas on my car at 16psi a few years ago. My best mph on race gas and n2o was 137mph. His car feels just as strong if not stronger on pump gas vs. pump gas since his car is about 200lbs lighter than mine. I thought at first that he was making close to 440-450rwhp because of how hard it pulls but after him telling me that his car was 200lbs lighter than mine (100lbs=20rwhp), I figured that his car was making around 410ish rwhp.

Go get those mustangs at the track stephen!!!!


BTW, what boost level were you making on that dyno pull? I saw 260ish rwtq?? If I use 20% conversion, it's about 312rwtq which puts it to around 14-15psi range based on the dyno chart. ??





Steve K

 

This thing is great fun.

I did a comparison graph of Car 15 (Max Coopers RX6B @ 14 psi), Car 76 (SPOs Twins @17 psi), and Car 73 (Silver Ninety Threes GT 35/40 @ 20 psi).

The two singles bracket the twins, and give an excellent indication of whats been acheived w/ the BNRs. The three cars seem to have similar setups other wise (usual boltons, streetport, no cats).

One would guess that they'd all be just about the same @ 17 psi.

 

I'm not totally sure what boost it was at , because I still had a small boost leak (from the fast idle hose, which was pinched off with a pair of vice grips as a quick fix). I was also not there - my mechanic took it over for a 'quick pull'. He's a Wolf guy and doesn't know the PFC very well, and he didn't check what the peak boost was. Since it was only getting to 1.12 on the commander afterwards, I'm assuming it was around 15 lbs, maybe close to 16.

Basically, I gotta get back to the dyno now that I have the datalogit, all of my leaks fixed, and better afrs and timing. Yesterday was supposed to be the day but Henry at Motorsports Dynamics is in Japan until next week.

SPO - if you have a datalog using datalogit, I'd love to see it.

Beast