Dyno results from my Coupe today, Very Dissapointed with results, this sux!!??
03-04-2007 | 10:23 AM
#21
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Joined: Dec 2005
Posts: 1,299
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From: Alvarado, Texas
Originally Posted by mellowyellow
Right... 
And isnt there dyno known to be off...
And isnt there dyno known to be off...
03-04-2007 | 10:36 AM
#22
Originally Posted by V6 Bird
Think about this for a second and please also post the graphs...
The MS4 cam has an intake lobe in the .650's correct? If the heads you have fall dead in the water you will lose power. I believe those heads go turbulent at .620 or right there abouts. And there are plenty of tricks with carb motors to make power. Just changing jets is very minute.
What plugs are you running in that car? You will get better results with a cooler plug and really lean on the carb tuneup. 36 degrees of timing is about normal for a carb setup. I gave you a persons number to get ahold of on Carb Tuning. He's the man and id bet youd see your numbers up even more if you had him go through the carb. Your not going to make near what others do since its a carb intake and carb setup. That heads/cam setup was strictly done with EFI in mind. Carb intake runners and CSA's are far different then FI stuff. its a very unmatched combo. You shouldnt be so disappointed.
The MS4 cam has an intake lobe in the .650's correct? If the heads you have fall dead in the water you will lose power. I believe those heads go turbulent at .620 or right there abouts. And there are plenty of tricks with carb motors to make power. Just changing jets is very minute.
What plugs are you running in that car? You will get better results with a cooler plug and really lean on the carb tuneup. 36 degrees of timing is about normal for a carb setup. I gave you a persons number to get ahold of on Carb Tuning. He's the man and id bet youd see your numbers up even more if you had him go through the carb. Your not going to make near what others do since its a carb intake and carb setup. That heads/cam setup was strictly done with EFI in mind. Carb intake runners and CSA's are far different then FI stuff. its a very unmatched combo. You shouldnt be so disappointed.
Almost every car in the world that wins in racing runs a cylinder head that will "run" out of steam yet run a larger camshaft. (Now laying over and losing airflow is completely different than if his cylinder heads just bust and go turbulent) I know Dema Elgin is a person who backs this theory 100 percent. Same with two guys I know who work at Greg Anderson's Shop. (We know THEY are making power LOL)
I will agree on the tuning advice though. So hard to tell on some person's dyno, running slicks, a large converter and wasteful trans. The Cam could definitely be changed (That is a fact). I will say though the numbers you have already ran in the car is quite impressive. Take that buggy out to a 1/4 mile track and see what she lays down!
Good luck getting it all straightened out.
03-04-2007 | 11:35 AM
#23
Take a look at the A/F ratio, looks pretty jumpy to me, get someone else to tune it. HPP tunes those, all they do is mustangs, not sure if they are great at it or not, i dont have a stang.
03-04-2007 | 12:07 PM
#24
8 Sec Tuner
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From: Wish I was in a boat fishing...
I see this stuff all of the time on my dyno. A race car with lots of good parts that doesnt make good numbers because of poor or bad converters! When we installed Beards first 408 he ran a Vigalante 3600 stall. Unlocked it dynoed 385 RWHP and locked it dynoed 475 RWHP!! I then suggested a Pro Torque converter. Yes it is alot more expensive but its much more efficient. Beards car then dynoed 465 RWHP unlocked and 475 RWHP locked. Thats 80 RWHP for unders 1200 dollars. Talk about bang for the buck.
Yes we are Pro Torque dealers...
Yes we are Pro Torque dealers...
Last edited by Mike TexaSS; 03-04-2007 at 12:12 PM.
03-04-2007 | 01:32 PM
#25
Originally Posted by Mike96z
Take a look at the A/F ratio, looks pretty jumpy to me, get someone else to tune it. HPP tunes those, all they do is mustangs, not sure if they are great at it or not, i dont have a stang.
Lol, you know that it is an LS1 right?
03-04-2007 | 01:34 PM
#26
Originally Posted by V6 Bird
Brandon if that was the case, Ill let andrew chime in so you can see his HUGE 40 hp dip from his ported TEA 1.5's and a MS4!!!
Peak powers didnt matter much but it falls dead on its face for about 500-700 rpms before and after 4800-say 5600 and picked back up til 6800 or so. Its a backing up port or a bad valve job. Both of which will cause the same problem in his car.
Peak powers didnt matter much but it falls dead on its face for about 500-700 rpms before and after 4800-say 5600 and picked back up til 6800 or so. Its a backing up port or a bad valve job. Both of which will cause the same problem in his car.
03-04-2007 | 03:51 PM
#29
Originally Posted by Vcious04
Dyno graphs posted now.. After I inspected the dyno sheets, he wasn't running the car like I asked. He was cutting it off short and it does like like I could give it some more rpm, 6800?? 7000??
It appears to still be picking up power past the point he let off.... dont go to USA again. they cant operated a dyno much less work on cars.... spin that bad boy up to 7k!!
Some dude there (before Robert left) was dynoing cars in 2nd, and drive......
(btw, it wasnt Mike)
03-04-2007 | 03:52 PM
#30
Originally Posted by Vcious04
You know Brian, it's weird you would say that.. After he did the last pull and guy walked up out of no were (seemed like a cool guy) and said, just for your info, their dyno is off man.. Did not really think anything about it, but anyways, I will be taking back to the track when I decide on some rearend susp components.
03-04-2007 | 08:33 PM
#32
You need to take the car to someone that can tune a carb motor the correct way...The jetting is not the only part on a carb that adds fuel or controls the amount of fuel delivered.
That af reading should be flat.
That af reading should be flat.
03-04-2007 | 08:47 PM
#33
Originally Posted by Sam88Gta1
You need to take the car to someone that can tune a carb motor the correct way...The jetting is not the only part on a carb that adds fuel or controls the amount of fuel delivered.
That af reading should be flat.
That af reading should be flat.
lol, most people that Tune carbs puts them further into left field then they were to begin with.
03-04-2007 | 08:51 PM
#34
Originally Posted by BigBronco
Almost every car in the world that wins in racing runs a cylinder head that will "run" out of steam yet run a larger camshaft. (Now laying over and losing airflow is completely different than if his cylinder heads just bust and go turbulent) I know Dema Elgin is a person who backs this theory 100 percent. Same with two guys I know who work at Greg Anderson's Shop. (We know THEY are making power LOL)
I will agree on the tuning advice though. So hard to tell on some person's dyno, running slicks, a large converter and wasteful trans. The Cam could definitely be changed (That is a fact). I will say though the numbers you have already ran in the car is quite impressive. Take that buggy out to a 1/4 mile track and see what she lays down!
Good luck getting it all straightened out.
I will agree on the tuning advice though. So hard to tell on some person's dyno, running slicks, a large converter and wasteful trans. The Cam could definitely be changed (That is a fact). I will say though the numbers you have already ran in the car is quite impressive. Take that buggy out to a 1/4 mile track and see what she lays down!
Good luck getting it all straightened out.
03-04-2007 | 10:24 PM
#35
Originally Posted by BigBronco
lol, most people that Tune carbs puts them further into left field then they were to begin with.
I worked at a Speed shop for awhile and sold alot of carbs to "carb experts".Most of them were returned cause they couldnt get it right.I must have tuned 100 of them in those 2 years.
03-04-2007 | 11:39 PM
#36
TECH Senior Member
Joined: Apr 2004
Posts: 6,955
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From: Houston / University of Texas, Austin
Originally Posted by Sam88Gta1
You mean try to tune carbs?
I worked at a Speed shop for awhile and sold alot of carbs to "carb experts".Most of them were returned cause they couldnt get it right.I must have tuned 100 of them in those 2 years.
I worked at a Speed shop for awhile and sold alot of carbs to "carb experts".Most of them were returned cause they couldnt get it right.I must have tuned 100 of them in those 2 years.
LOL... gotta up jet!
03-05-2007 | 02:04 AM
#38
your trap speed will tell the story of HP. I mean you are going 100mph in the 1/8 mile. I have only gone 98mph in the 1/8, and make 494rwhp. You may make less than that because of your weight, but that would be in the ball park.
Thomas
Thomas
03-05-2007 | 08:49 AM
#40
Thread Starter
Joined: Dec 2005
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From: Alvarado, Texas
Thanks for the input guys. I'm just looking past the dyno and will be building a set of custom 1 7/8's headers, installing a 3" x-pipe, carb spacer (plastic, noticed the carb was burning hot when I did a jet change on the dyno), and installing my transbrake.
I took it to the track last night and here is the results..
Total of 2 passes
1st pass, 26 deg of total timing, 18psi in tires, drove to the track, no cool down, stalled to about 1700rpm, shifted about 6700rpm :
r/t : .356
60' : 1.764
330' : 4.712
mph : 78.06
1/8 : 7.118
mph : 100.13
2nd pass, 34 deg of total timing, 18psi in tires, hot lapped it, stalled to about 3000rpm, hit the revlimiter from 1st - 2nd, shifting at 6900rpm
r/t : .083
60' : 1.754
330' : 4.667
mph : 78.59
1/8 : 7.063
mph : 100.48
All in all, once I get my new suspension for the rear and transbrake, I think ti will run a 6.7 - 6.8.. Well see..
I took it to the track last night and here is the results..
Total of 2 passes
1st pass, 26 deg of total timing, 18psi in tires, drove to the track, no cool down, stalled to about 1700rpm, shifted about 6700rpm :
r/t : .356
60' : 1.764
330' : 4.712
mph : 78.06
1/8 : 7.118
mph : 100.13
2nd pass, 34 deg of total timing, 18psi in tires, hot lapped it, stalled to about 3000rpm, hit the revlimiter from 1st - 2nd, shifting at 6900rpm
r/t : .083
60' : 1.754
330' : 4.667
mph : 78.59
1/8 : 7.063
mph : 100.48
All in all, once I get my new suspension for the rear and transbrake, I think ti will run a 6.7 - 6.8.. Well see..