[JakeM]

Originally Posted by tbirdscwd That is really good to know Jake. I was always told (by many dyno tuners themselves) that the dynojets are not able to adjust the load on the car. The tq readings are determined by how fast a car can accelerate the weighted drums vs a brake type drum setup where the load is introduced based on specific inputs. I would be interested to see how this is achieved.

Well, I know for a fact that a 224xlc Dynojet has software capable of adjusting the application of load via the electric load cells. I'll send you the spreadsheet when I find my flash drive... I'm at work and 99% of the time I have it but I couldn't find it this morning at my GF's house.

The easiest way to explain it is this; the stock dynojet software has the load increasing linearly. In basically a straight line going up as speed goes up. Mustangdyno's stock software is more like a steady curve going up. Increasing load exponentially as speed increases. Which the mustang dyno setup is said to be more like "real world" load. But I've spoken with a few tuners that really don't like the way that mustangdyno's load up. Usually though, those tuners don't own the shop and aren't calibrating the dyno. They just tune the customers cars.

[limited]

Originally Posted by JakeM LoL.. Ok, but what I am saying is that the numbers mean nothing... Dynojet or not........ All those posts about 2v's breaking on dynojets with dynojet numbers mean nothing. Why are comparable numbers benificial to you? The tune on all those cars that broke is more than likely vastly differen't than your tune. Therefore, the numbers are useless. Because those cars broke at "X" amount of horsepower does not mean your car will or will not break at "X" amount of horsepower as well. This is what I'm getting at. Comparing the numbers is going to do nothing for you but make you worry needlessly or overconfident.

I realize it is a russian roullette with a stock block(have another build in progress) I would like 450rwhp(comparible dyo jet #'s). I am running 15* timing now. if there is a 10hp diff I will add a*, if there is a 8 to 12% difference I will remove one. This was just a simple ?(mainly for people who have been on both) not debate on my motor lasting

[JakeM]

If you are not trying to run a number at the track how is hitting your 450rwhp mark not just for bragging rights? Thats all I'm saying. If that was the case, why not have Joe tune the car to 450rwhp if you not scared of it popping? It just doesn't make any sense to me is all.

[tbirdscwd]

Originally Posted by JakeM Well, I know for a fact that a 224xlc Dynojet has software capable of adjusting the application of load via the electric load cells. I'll send you the spreadsheet when I find my flash drive... I'm at work and 99% of the time I have it but I couldn't find it this morning at my GF's house. The easiest way to explain it is this; the stock dynojet software has the load increasing linearly. In basically a straight line going up as speed goes up. Mustangdyno's stock software is more like a steady curve going up. Increasing load exponentially as speed increases. Which the mustang dyno setup is said to be more like "real world" load. But I've spoken with a few tuners that really don't like the way that mustangdyno's load up. Usually though, those tuners don't own the shop and aren't calibrating the dyno. They just tune the customers cars.

Not doubting it. I have had my car on multiple dynos, but have only done my own tuning (rented a dyno) on a mustang dyno. Haven't really messed with a dynojet myself. I know there have been several different models of of dynojets also which I'm sure have had different capabilities and software etc....

[phoenixmustang]

Originally Posted by JakeM If you are not trying to run a number at the track how is hitting your 450rwhp mark not just for bragging rights? Thats all I'm saying. If that was the case, why not have Joe tune the car to 450rwhp if you not scared of it popping? It just doesn't make any sense to me is all.

What is wrong with him wanting to achieve 450rwhp or whatever # he wants? It is cool if your point of view on this topic is different, but you should respect his. All of your posts in this thread have been offensive; you are just putting down the guy for wanting to learn more on this subject. Share your opinion, tips, your knowledge, but don't offend people because they think different than you or because they don't know something.

[JakeM]

Originally Posted by phoenixmustang What is wrong with him wanting to achieve 450rwhp or whatever # he wants? It is cool if your point of view on this topic is different, but you should respect his. All of your posts in this thread have been offensive; you are just putting down the guy for wanting to learn more on this subject. Share your opinion, tips, your knowledge, but don't offend people because they think different than you or because they don't know something.

Offensive? Never said anything was wrong with him wanting to achieve 450RWHP.. But why didn't he just do that when he got tuned, if that was what he wanted? Does that make sense to you? I'm not trying to offend anyone. I'm trying to inform him that he may be wasting his time and money by trying to hit a number that is basically made up. If you find that offensive, then so be it.

[limited]

Originally Posted by JakeM Offensive? Never said anything was wrong with him wanting to achieve 450RWHP.. But why didn't he just do that when he got tuned, if that was what he wanted? Does that make sense to you? I'm not trying to offend anyone. I'm trying to inform him that he may be wasting his time and money by trying to hit a number that is basically made up. If you find that offensive, then so be it.

Never had a hp goal in mind, had the tune at 11.7 afr and 15* and what ever power it was,was. I always figured ~400rwhp from what other people put down(dyno jet #'S!) when I saw 424(even the mustang dyno operator was impressed with the power it put down,which I give credit to the cams) I want 450(dyno jet )I see this as very doable. I have the prp package and can adjust areas but does no good when you don't know where your at to start. even thou I am not scared to blow it, I am not intentionally going to do it either and the # of 450rwhp makes me all warm and fuzzy, again going off R&D of research based on dyno jet #'s.

I have a convert so going to the track is not an option(not going to cage it) and btw,I also don't find you offensive, but you do have different opinions than mine and that's okay

[JakeM]

I understand limited. But, I don't think there is going to be anyone that is going to be able to tell you a direct conversion truthfully and accurately.. There are so many variables. Just to start getting close you would have to find someone that dyno'd with the same exact combo, under the same exact weather conditions with a known good dyno calibration. Impossible to find? No. Just highly unlikely. The only reccomendation I can give you is to wait for spring and find a shop with a dynojet that is doing a dyno day or something like that. So you can do it on the cheap. That is going to be the only way to truly find out. Also, if you find yourself down on power, I would not recommend going over 17* of timing if you are using pump gas all the time. In my experience two valves don't "like" a bunch of timing.

[JTs03v6]

There is no defenite answer. Sounds like your tune is safe though, except for having the rev limiter set at 5800rpm. If you want to keep the rpms below 6k thats fine. But you dont want to hit the factory rev limiter while in boost and wot because factory limiter pulls fuel.

Other than that, those are good numbers out of a mustang dyno, aka "The Heart Breaker".

[limited]

Originally Posted by JTs03v6 There is no defenite answer. Sounds like your tune is safe though, except for having the rev limiter set at 5800rpm. If you want to keep the rpms below 6k thats fine. But you dont want to hit the factory rev limiter while in boost and wot because factory limiter pulls fuel. Other than that, those are good numbers out of a mustang dyno, aka "The Heart Breaker".

did not know it was that low, just loaded tune"as is" and apparently it was at 5800, Have since raised to 6200. trust me I was bummed. the graph's were still climbing and it seemed it just got going

[quickndslick2]

nice numbers man, what mods do you have on your car? what supercharger are you running? how many #'s are you boosting?

[limited]

Originally Posted by quickndslick2 nice numbers man, what mods do you have on your car? what supercharger are you running? how many #'s are you boosting?

everything is in garage, only thing different is I welded in some cats on the o/r h. It has the 9 psi pulley on it

[Eagle2000GT]

I've had my car on both. I didn't like the original tune (Mustang Dyno). My MAF was pegged and they tuned it rich mid-range (9.9 afr) so it wouldn't go too lean at 6000 rpms (12.4 afr). The car was making 385 rwhp/370 rwtq.

I bought an MAFia and had it tune six months later on a Dynojet. I showed the new tuner my old dyno sheet so he could see the A/F ratios so he may have adjusted his Dynojet. Anyway, the first pull before he adjusted things was 385 rwhp/367 rwtq. Not a lot of difference.

When he got done, the dyno read 370 rwhp/377 rwtq. Peak went down a little but it picked up 15-20 rwhp mid-range. AFR is a fairly steady 11.6.

From my experience, I don't think there is very much difference between a Mustang Dyno and a Dynojet.

[quickndslick2]

Originally Posted by limited everything is in garage, only thing different is I welded in some cats on the o/r h. It has the 9 psi pulley on it

cant seem to view your garage dude

[quickndslick2]

nevamind isaw it, damn i wish i went with a kb lol made way more than my procharger at 9#'s i wonder if its the actual supercharger or because you have stage 3 blower cams and i have stage 2 comp cams, nice fuel setup you got there bro

[limited]

Originally Posted by quickndslick2 nevamind isaw it, damn i wish i went with a kb lol made way more than my procharger at 9#'s i wonder if its the actual supercharger or because you have stage 3 blower cams and i have stage 2 comp cams, nice fuel setup you got there bro

must be the tune, 395rwhp out of a d1 with cams does not sound right to me

[JTs03v6]

Originally Posted by limited did not know it was that low, just loaded tune"as is" and apparently it was at 5800, Have since raised to 6200. trust me I was bummed. the graph's were still climbing and it seemed it just got going

I know what you mean. I had a similar issue with mine last time on the dyno, had the plugs gapped to much and spark blowout. Pulled to 5700rpm and the graph was still climbing.

I'd guess your car should be mid 11's with some 28" slicks and launching it at 5000rpm.

[blownstang]

Originally Posted by gragra73 I have heard that the difference is 11-12%.

Same here.

[limited]

Originally Posted by blownstang Same here.

This is the main reason for starting this thread. A google search provided a range of 8 to 15%. i was looking for actual results, if possible, from members. A big difference to me if I attempt to change parameters in my tune

[blownstang]

OP, your numbers sound right on. Most KB 2.1 intercooled kits at 9psi make 400-420rwhp on a dynojet on a car with just midpipe and mufflers/catback. With blower cams you should gain another 60-70 rwhp. If you made 424rwhp on a Mustang Dyno that should translate to 475rwhp on a dynojet.