Greddy T-78 Dyno@19lbs
Laying Down Rotary Law
Joined: Mar 2001
Posts: 2,075
Likes: 1
From: central florida
do you have the walbros running all the time or does one get activated by a switch or comes on by the ECU at a pre-set boost level
nice numbers!
GRDDY 78 proves its selfagain compared to
nice numbers!
GRDDY 78 proves its selfagain compared to
Weird Cat Man
Joined: Aug 2001
Posts: 2,868
Likes: 3
From: A pale blue dot
Jason, Good numbers. Are you still confident that your Mustang dyno gives "dynojet-like" results? I'm not doubting anything but I just want to know how many cars you've also thrown on a dynojet to see if the numbers are close (+/- 5%)
Thanks,
Brian
Thanks,
Brian
Originally Posted by Wargasm
Jason, Good numbers. Are you still confident that your Mustang dyno gives "dynojet-like" results? I'm not doubting anything but I just want to know how many cars you've also thrown on a dynojet to see if the numbers are close (+/- 5%)
Thanks,
Brian
Thanks,
Brian
I have had probably 8 cars that have dyno'd on both and the numbers are very close.
Jason
Originally Posted by sevenin7
Is this T-78 with 17cm or 24cm exh housing ?
Im not sure the size of the exhaust housing. They dont give us that option and the other housing it probably special order from Japan.
Jason
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Laying Down Rotary Law
Joined: Mar 2001
Posts: 2,075
Likes: 1
From: central florida
what size lines with the Duel Wal's -8 feed & stock return? or -6 return etc
I've been meaning to do a setup like that 2 walbros
but always been told just to have 1 on for daily driving and 2 for the track
I've been meaning to do a setup like that 2 walbros
but always been told just to have 1 on for daily driving and 2 for the track
Originally Posted by kabooski
what size lines with the Duel Wal's -8 feed & stock return? or -6 return etc
I've been meaning to do a setup like that 2 walbros
but always been told just to have 1 on for daily driving and 2 for the track
I've been meaning to do a setup like that 2 walbros
but always been told just to have 1 on for daily driving and 2 for the track
Jason
Rotary Enthusiast
Joined: Aug 2001
Posts: 1,236
Likes: 1
From: Waiting for Indykid to catch up
Originally Posted by Jason
Thanks,
I have had probably 8 cars that have dyno'd on both and the numbers are very close.
Jason
I have had probably 8 cars that have dyno'd on both and the numbers are very close.
Jason
435@16lbs at RX-7 Store
465@18lbs at Moderns Speed Labs Dynojet
Rotary Freak
Joined: Oct 2002
Posts: 1,625
Likes: 0
From: Salem, IN
Originally Posted by radkins
I dynoed my car on a dynojet and the numbers were right in line with Jasons dyno.
435@16lbs at RX-7 Store
465@18lbs at Moderns Speed Labs Dynojet
435@16lbs at RX-7 Store
465@18lbs at Moderns Speed Labs Dynojet
the mazda zoom zoom store
Joined: Feb 2001
Posts: 749
Likes: 1
From: Columbus, Oh
We will be putting the car on the dyno again today. The car is still really rich right now, so hopefully we can gain some more power . Also the car has dual denso pumps, I'm seeing 71 % duty cycle at that boost level.
Weird Cat Man
Joined: Aug 2001
Posts: 2,868
Likes: 3
From: A pale blue dot
If you guys are going to do a few more runs, could you do me a huge favor and run a couple at lower boost too? I like to collect lots of graphs for my page ( http://www.catenet.net/dyno.php ) as you know 
Maybe 10 and 15 PSI or something would be great.
Also, how are you starting off the dyno? It looks like you have very little lag which would be unusual for a T78. Are you holding the load on the engine and then "releasing" it?
I guess I'm not too familiar with how the Mustang dyno works. I know on a Dynojet, you "see" lag because the rollers are changing speed the whole time, so it makes it difficult to preload the engine. So the only way to make your car look less laggy that I know of on a Dynojet would be to start from very low RPM, floor it, let it spool really slowly and then start logging on the dyno once you've already built up a couple PSI.
Anyhow, not too familiar with the procedures on a Mustang dyno... so I dunno. Is it really that lag free or does the dyno preload your engine somewhat so you can spool up a few PSI before you start graphing?
Maybe 10 and 15 PSI or something would be great.Also, how are you starting off the dyno? It looks like you have very little lag which would be unusual for a T78. Are you holding the load on the engine and then "releasing" it?
I guess I'm not too familiar with how the Mustang dyno works. I know on a Dynojet, you "see" lag because the rollers are changing speed the whole time, so it makes it difficult to preload the engine. So the only way to make your car look less laggy that I know of on a Dynojet would be to start from very low RPM, floor it, let it spool really slowly and then start logging on the dyno once you've already built up a couple PSI.
Anyhow, not too familiar with the procedures on a Mustang dyno... so I dunno. Is it really that lag free or does the dyno preload your engine somewhat so you can spool up a few PSI before you start graphing?
Originally Posted by Wargasm
If you guys are going to do a few more runs, could you do me a huge favor and run a couple at lower boost too? I like to collect lots of graphs for my page ( http://www.catenet.net/dyno.php ) as you know Maybe 10 and 15 PSI or something would be great.
Also, how are you starting off the dyno? It looks like you have very little lag which would be unusual for a T78. Are you holding the load on the engine and then "releasing" it?
I guess I'm not too familiar with how the Mustang dyno works. I know on a Dynojet, you "see" lag because the rollers are changing speed the whole time, so it makes it difficult to preload the engine. So the only way to make your car look less laggy that I know of on a Dynojet would be to start from very low RPM, floor it, let it spool really slowly and then start logging on the dyno once you've already built up a couple PSI.
Anyhow, not too familiar with the procedures on a Mustang dyno... so I dunno. Is it really that lag free or does the dyno preload your engine somewhat so you can spool up a few PSI before you start graphing?
Maybe 10 and 15 PSI or something would be great.Also, how are you starting off the dyno? It looks like you have very little lag which would be unusual for a T78. Are you holding the load on the engine and then "releasing" it?
I guess I'm not too familiar with how the Mustang dyno works. I know on a Dynojet, you "see" lag because the rollers are changing speed the whole time, so it makes it difficult to preload the engine. So the only way to make your car look less laggy that I know of on a Dynojet would be to start from very low RPM, floor it, let it spool really slowly and then start logging on the dyno once you've already built up a couple PSI.
Anyhow, not too familiar with the procedures on a Mustang dyno... so I dunno. Is it really that lag free or does the dyno preload your engine somewhat so you can spool up a few PSI before you start graphing?
The reason it looks like it spools quick is because we are starting the run at 3000 RPM. We will start it at 2000 next time and the graph is going to look laggier.
We have the dyno setup so it loads it similar to a dynojet.
I will get a graph at the lower boost levels, but we will do that on pump gas.
Jason
the mazda zoom zoom store
Joined: Feb 2001
Posts: 749
Likes: 1
From: Columbus, Oh
Tune the car some more tonight put down 496rwhp and 354 trq boost is still running on the graph 19.5 to 20. I wanted to shoot for the 500rwhp number, but decided to get the car off the dyno for the day ( lots of pulls). Will crank the boost up to 22-24lbs and see what we get. will post graph tomorrow.
Last edited by zayrx7; Jul 30, 2004 at 09:19 PM.
Rotary Freak
Joined: Oct 2002
Posts: 1,625
Likes: 0
From: Salem, IN
Originally Posted by zayrx7
Tune the car some more tonight put down 496rwhp and 354 trq boost is still running on the graph 19.5 to 20. I wanted to shoot for the 500rwhp number, but decided to get the car off the dyno for the day ( lots of pulls). Will crank the boost up to 22-24lbs and see what we get. will post graph tomorrow.
