swingvalve 2.25/2.5/3"shootout

[deuce dodge]

lets say good amount of fuel 2.2 or 2.5 liter......18 psi......200whp

what hp difference..........if the 2.1/4 swingvalve is removed and replaced with 2 1/2" then 3".

trying to find out if 2 1/2" will go 300 crank hp (i have one on hand)

or if its worth it to buy 3" sv

deuce

[GLHNSLHT2]

Chris used to have a 2.5" to 3" dyno chart. I have it on my other puter. 30lb-ft gain, and 30-40hp under the curve with a 5hp peak. Basically made the power curve flat as a table from 4grand to 6k. Definately worth it. 3" rocks.

[tryingbe]

It's easier to make 300hp with 3 inch swing valve than it is 2 1/2 inch.

[turbovanman²]

You guys don't look very hard,


http://www.turbosunleashed.com/image...no_results.jpg


Yes, you can make 300 crank HP with a 2.5 inch SV.

[Frank]

And you dont know the tricks of creating posts! HAHAHAHA

[deuce dodge]

strange.it seems to not make as much hp/torque in the lower rpms...am i missing the point????

looks like it won't help until 5200 rpm....over 2.5.....


deuce<<<<<dyno chart novice???????????

[GLHSKEN]

Look at the chart again. The top 2 lines are the TQ... They begin to separate at 3500 rpm... As do the hp lines...

While there in an implied peak tq gain of 20-30 ft lbs... The hp just riees sooner and stays flat/... The 3" is definately worth the $$ especiaally when the turbo and all are upgraded..

[Marcus86GLHS]

the TU-manufactured 3" swing valve is one the best pieces of hardware for any Turbododge looking to make more power, it's got excellent construction and a very reasonable price.

DEUCE you wont regret spending the extra $ for this item.

here it is in the foreground:

[Frank]

Look at the chart again. The top 2 lines are the TQ... They begin to separate at 3500 rpm... As do the hp lines...

While there in an implied peak tq gain of 20-30 ft lbs... The hp just riees sooner and stays flat/... The 3" is definately worth the $$ especiaally when the turbo and all are upgraded..

Not to mention this is on a mild performance setup... the gains really come alive when you are pushing 300hp.


Frank

[The S is Silent]

Marcus,

Where did you get the catback exhaust?

[Marcus86GLHS]

Matt:

SV, downpipe, big can & hardware: TU
catback system (2) pipes: FWD Performance
Magnaflow 3" cat and Borla chrome turndown: Summit
Muffler: what muffler? who needs one.

this mod totally transformed the engine's power and torque.

[BadAssPerformance]

My Z went 120mph (1/4 mile) on the 2.5" turbonetics piece and then 120mph on the 3" TU piece both were ceramic coated and both with same ~2750# race weight and same everything else except the 3" Downpipe was slightly modded to package the 3" SV better and thermal wrapped with the 3". And if it matters, the neck of the DP where the clamp is measures about 2.8" at the smallest section for both the 2.5" and 3" SV runs...

[turbovanman²]

And you dont know the tricks of creating posts! HAHAHAHA

I could have done that also,

[deuce dodge]

thanks KEN..now i get it.......dohh was reading chart wrong..........

and great pic......sweet pipes....

deuce

[slasky]

My Z went 120mph (1/4 mile) on the 2.5" turbonetics piece and then 120mph on the 3" TU piece both were ceramic coated and both with same ~2750# race weight and same everything else except the 3" Downpipe was slightly modded to package the 3" SV better and thermal wrapped with the 3". And if it matters, the neck of the DP where the clamp is measures about 2.8" at the smallest section for both the 2.5" and 3" SV runs...

So it did not help at all for your car?
I am going to drop in a super 60 next month and i was thinking about getting the 3 inch swingvalve.

[GLHSKEN]

Good question... Well JT??? What was the E.t. before and what was it after?? From the dyno chart... your results do not surprise me as the SV really helps the low end. and up top they seem to be about the same...

[contraption22]

Im curious myself. Although ET has so many more variables than trap speed.

[cordes]

I wish I would have seen that graph before I got my turbo and every thing on the omni. I think the 3" SV would be a great addition to any car once the basic mods are done. There is a huge increase in area under the curve there.

[GLHSKEN]

Hence my e.t question... I recall JT in the High 11.8's before...

[BadAssPerformance]

11.90's for both the 2.5" and 3" SV's... dropped to 11.62 once I got a good clutch in it... consistent 11.70's-80's since

also, the rpm is never below 4000-4500 rpm on these runs, launching from ~5000 so maybe thats partly why, unless the slight necking down makes a huge difference. keep in mind, this is also with mandrel bent 3" all the way out to the back of the car thru a 3" Dynomax Bullet, no cat.