New Dyno :)
#16
Addict
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
![](http://www.picvault.info/images/537031680_951dyno07.jpeg)
I have to agree with George. Something is suboptimal. I have never seen a K26/6 put down more hp than tq (perhaps because of Dynojet measurements). I have never seen a K26/6 put down 270rwhp at 16# boost (especially on a Mustang dyno). Also tq peak should be far earlier than hp peak. My K27/6 above peaks tq at 3k or less, and the K26/6 should peak even earlier. There is usually a good 2000rpms between the 2 peaks, regardless of tuning. Either you have a leak, or more likely it is some kind of K26/8 hybrid/cheater turbine. Add another 2-3# boost and you will be at 300rwhp if the HG holds (far too lean).
#20
Drifting
Join Date: Oct 2005
Location: Hampton Roads, VA
Posts: 2,926
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have to agree with everyone saying something is wrong....
My 26/6 dyno chart:
![](http://memimage.cardomain.net/member_images/4/web/2128000-2128999/2128495_13_full.jpg)
Car: '86 951- 146K miles
Mods:
72# injectors
3 bar FPR
Lindsey DP wastegate w/ manual boost controller
Vitesse Maf
Vitesse chip/board
smt-6
forge bypass valve
*note*
STOCK exhaust with ORIGINAL cat.
My 26/6 dyno chart:
![](http://memimage.cardomain.net/member_images/4/web/2128000-2128999/2128495_13_full.jpg)
Car: '86 951- 146K miles
Mods:
72# injectors
3 bar FPR
Lindsey DP wastegate w/ manual boost controller
Vitesse Maf
Vitesse chip/board
smt-6
forge bypass valve
*note*
STOCK exhaust with ORIGINAL cat.
#21
Addict
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by George D
Eclou,
That is a great dyno sheet. That car must be a blast to drive.
George
That is a great dyno sheet. That car must be a blast to drive.
George
#22
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Stock cam (that is soon to change). I am going to go with the wastegate theory problem, as that seems most logical. I will throw the Tial on and see how the graph looks afterwards.
With the old motor, when it was moderately healthy, it made 252/270, so yes the tq was higher than hp, and higher than it is now.
It is a stock 26/6, no modifications, this I know for a fact.
We will see how high this worn out old turbo will go before upgrading![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
I think the late torque is also partially an issue with the tuning of the chips that is currently in it.
With the old motor, when it was moderately healthy, it made 252/270, so yes the tq was higher than hp, and higher than it is now.
It is a stock 26/6, no modifications, this I know for a fact.
We will see how high this worn out old turbo will go before upgrading
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
I think the late torque is also partially an issue with the tuning of the chips that is currently in it.
#23
Drifting
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Eclou,
Do you mean Tony Garcia out in California? Sorry to go OT. I'm building a 3.0 968 RS spec motor with the goal to have your dyno with another 150hp and tq. We'll see how things pan out.
George
Do you mean Tony Garcia out in California? Sorry to go OT. I'm building a 3.0 968 RS spec motor with the goal to have your dyno with another 150hp and tq. We'll see how things pan out.
George
#24
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Eclou: I put down 273RWHP at 15psi (15.3psi max) on a dynojet. I think that even on a mustang dyno and 1psi more that I would be close if not at 270rwhp on a mustang dyno. Mods in sig, nothing "abnormal".
But I do think that the dyno is kind of messed up. Im thinking that maybe his WG is SOOO bad that it doesnt hold boost at all until about 2800rpms and then maybe starts making boost? that would be a long shot though. But could be possible?
heres a graph from my dyno:
http://i28.photobucket.com/albums/c2...4DynoSheet.jpg
But I do think that the dyno is kind of messed up. Im thinking that maybe his WG is SOOO bad that it doesnt hold boost at all until about 2800rpms and then maybe starts making boost? that would be a long shot though. But could be possible?
heres a graph from my dyno:
http://i28.photobucket.com/albums/c2...4DynoSheet.jpg
#27
Addict
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
270 is awesome for a stock 26/6 at 15#. I could not get more that 260 +/- 3 hp from mine with a MAF, Tial, MBC, 3 bar and Guru chips. The tq would keep going up with added boost but the hp pretty much maxed at 260ish. It is quite possible my old 26 compressor was losing its legs.
One would think that a bad WG (weak spring) would bleed more at higher pressures, but who knows? 270 on a Mustang is probably close to 290 on a dynojet.
One would think that a bad WG (weak spring) would bleed more at higher pressures, but who knows? 270 on a Mustang is probably close to 290 on a dynojet.
#28
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
true true. Maybe I couldnt reach 270 on a mustang. Before mods I was at 313RWTQ at 19psi. I bet at 19psi with my current set-up I would achieve about 320RWTQ (give or take 5tq) with maybe a few HP. max HP was at 5550rpm for me and at that rpm I would need about 255rwtq. Im not sure if my turbo is running out of steam at that point or not to creat enough boost for that tq level?
But back to the original post, I can almost guarantee that either there is a major boost leak or WG leak or that the dyno sheet is not of a 951.
But back to the original post, I can almost guarantee that either there is a major boost leak or WG leak or that the dyno sheet is not of a 951.
#30
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by JE_951
But back to the original post, I can almost guarantee that either there is a major boost leak or WG leak or that the dyno sheet is not of a 951.