Hey guys i just wonder how many horse power on the RSX type s? Beacuase i know it was 200hp stock but on SUPER STREET magazine said they put it on dynos test and its only 171?? So im kinda confused anyone in here kno the true power of RSX TYPE S pleae let me kno thank you alot....

 

The 200 is at the crank and the 171 is at the wheels. When the power comes off the crank and goes through the clutch and tranny and out through the axles is loses some of its original power as it converts to heat.

 

also note the different dynos - result in different numbers... dynos are more effectively used for measuring gains from one set up to another (in terms of modification)

there are also different types of dynos
Mustang (typically lower #'s)
DynoJet
Dynapack (typically higher numbers - measures HP at the hubs not at the wheels)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adirondackR &raquo;</TD></TR><TR><TD CLASS="quote">also note the different dynos - result in different numbers... dynos are more effectively used for measuring gains from one set up to another (in terms of modification)

there are also different types of dynos
Mustang (typically lower #'s)
DynoJet
Dynapack (typically higher numbers - measures HP at the hubs not at the wheels)</TD></TR></TABLE>

Dynapacks actually tend to read lower...doesn't matter that the packs mount to the hub...it's all in the program.

Builthatch and I tuned up at Jeff Evans tuning in easton PA on a 40deg day and put out 138whp/109tq and 143whp/112tq respectively.

The week after on a 60deg day he put down 155whp/115tq on a local dynojet. I've only had experience with Jeff Evans dynapack but from research looks like dynapacks read ~10% lower than dynojets.

Both engines were N/A 12.25:1 SOHC y8's (if any of you k-series guys remember your roots )
Vince

 

not here to start an E-fight & I do believe your readings but to be honest with you, in general dynapacks read higher - BUT it boils down to how the dynapack is set up

This was taken from another thread - quoted from Shawn Church @ Church Automaotive Tuning (one of the leaders in tuning cars)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C_A_T &raquo;</TD></TR><TR><TD CLASS="quote">I find that my Dynapack usually reads higher, but you can change a lot of variables and make it read more or less. That's why it is soooo important to be consistent. Test the car the same way, every time. What tends to be most important during ramp testing is the rpm/sec ramp rate. Keep that consistent (even if you change rpm range) and your readings will be consistent.

I also find that vs. the Dynojet, the Dynapack is a far more effective tuning tool - or maybe I should say it makes life a _lot_ easier. Because of the ability to hold a specific rpm (and vary load) or hold a load (and vary rpm), you can simulate 98% of the conditions you see in driving. Every single map cell can be tuned with a wideband while remaining on the dyno.

I also find it extremely effective for race cars. We can simulate what a drag car sees in any gear, at any time on the strip. In an ideal situation, we'll actually look at in car video from a pass and mimic the exact rpm range and time spent in gear (e.g. 4th gear, 8000 to 10,500 in 3.6 seconds if that's what the video shows).

The only thing that you have to take into account is that ram-air/fresh air systems do tend to run a little leaner in the real world, as do intercooled setups. But, if you set a nice flat fuel curve on the dyno, you can either run it a little rich to start with (which is safer) or allow the customer to tweak the FPR for the final 1% on the track.

C_A_T</TD></TR></TABLE>

look at Shawn Hillier & his k20 powered EK....he dyno'd 247 hp on dynopack & like 220 on dynojet

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adirondackR &raquo;</TD></TR><TR><TD CLASS="quote">not here to start an E-fight & I do believe your readings but to be honest with you, in general dynapacks read higher - BUT it boils down to how the dynapack is set up

This was taken from another thread - quoted from Shawn Church @ Church Automaotive Tuning (one of the leaders in tuning cars)

look at Shawn Hillier & his k20 powered EK....he dyno'd 247 hp on dynopack & like 220 on dynojet</TD></TR></TABLE>

Good info...hehe no need to fight. I know i've found similar threads describing the opposite, but like posted above it's really all in how the tuner sets up their programming (ie. SAE values, air temp standard correction...).

Jeff from Evans Tuning said his cars usually trap higher speeds than expected from whp numbers...so it's most likely the way he sets things up.

I was really impressed with how consistant Jeff's dynapack setup was...by the end of the tune we made several pulls with Power FC program untouched and WHP and TQ #'s were within 1whp consecutively. Pretty amazing to me, i know Builthatch's pulls on the dynojet were within 5whp between 3 pulls...his highest being the 155.



Vince

 

Most people will tell you that the general assumption is that the dynapacks read a tad (4% or so) higher than the dynojet. BUT alot of people are now claiming that some do read low. As in the case with the dynapack at evans-tuning here in PA.

Then theres churches, which tends to read more than 4% high (judging by graphs here on ht and word of mouth)

Theres no way to really make a conversion factor when there are several input parameters to be set by the user.

 

The real thing to remember is that once you go to a Dyno, try to go back to that same one everytime. Because then even if the numbers aren't exactly the same as some other shops dyno, the difference between your readings will be consistant. Thus you will know what you actually gained.

Some of these poeple that baseline there car at one place, and then put a header on 6 months later and go dyno somewhere else, and come back saying they lost 5 HP may have actually short changed themselves, and they may have actually gained some power but just can't tell due to the different reference levels of each dyno.