Any dyno or track times with a 74mm pulley
#1
Member
Thread Starter
Any dyno or track times with a 74mm pulley
I'm debating on what SC pulley to get this summer. I already have EC mid length headrs, split cooling with the Johnson pump and an EC tune.
Was thinking of a huge HE, 77mm or 74mm pulley, belt wrap kit, 82mm TB, Tc tune and maybe just some drop in K&N filters.
I saw that DTK has a sale on thier dtk650 kit, so their 650bhp kit. They claim these numbers with a 74mm clutched pulley, 82mm tb, trans and ecu tune, bwk, and a big HE with no trunk tank.
Has anyone dyno'd their 74mm pulley? With 20% drivetrain Id imagine about 520whp.
Alex
Was thinking of a huge HE, 77mm or 74mm pulley, belt wrap kit, 82mm TB, Tc tune and maybe just some drop in K&N filters.
I saw that DTK has a sale on thier dtk650 kit, so their 650bhp kit. They claim these numbers with a 74mm clutched pulley, 82mm tb, trans and ecu tune, bwk, and a big HE with no trunk tank.
Has anyone dyno'd their 74mm pulley? With 20% drivetrain Id imagine about 520whp.
Alex
#2
MBWorld Fanatic!
That's pretty close to my setup, but I have a 77mm pulley and my tune is by RaceIQ. I figure I'm making around 625hp at the crank, based on the calculator here: http://www.wallaceracing.com/et-hp-mph.php
I don't know how much more boost the 74mm gives, but ~25hp seems reasonable. With that setup on drag radials you could probably run something like 11.10 @ 123 in the quarter, assuming a density altitude of 0 ft.
I don't know how much more boost the 74mm gives, but ~25hp seems reasonable. With that setup on drag radials you could probably run something like 11.10 @ 123 in the quarter, assuming a density altitude of 0 ft.
#6
Senior Member
DTK had some bad feedback initially, but he has pretty good customer service and warrants his work. Check out either of the AMG E55 pages and you'll be able to see that.
74 is a pretty small pulley and you'd want to have your cooling sorted. If you had low ambients already and just the occasional pull you would likely be okay.
A set of 550s wouldn't hurt either
74 is a pretty small pulley and you'd want to have your cooling sorted. If you had low ambients already and just the occasional pull you would likely be okay.
A set of 550s wouldn't hurt either
#12
Super Member
I have a 77mm clutched pulley and everything else you're talking about having except from the throttle body upgrade and I am still getting a little bit of heat soak (minimal) after a few hard pulls. Unless you're getting a trunk/engine bay tank or meth I would not recommend going smaller. Especially if the bigger throttle body adds more heat? I'm not sure on that one.
Also I hear that the equivalent crank pulley (180mm for 77mm) gives more torque than supercharger pulley so you may want to think about that option.
#14
Super Member
If you're going meth/water I think IAT's won't be a problem for you. Have you seen VRPspeed's 70mm clutched pulley? Clutched is good if your getting a bigger TB so you can avoid the dreaded TB hiccup which sounds like a nightmare from what I've read.
#17
EC and Kleemann headers are basically the same. I don't think its economical to use long tubes unless you've already got all the other go fast mods as they're very expensive for little gain over mid-lengths like you already have.
I have a 77mm clutched pulley and everything else you're talking about having except from the throttle body upgrade and I am still getting a little bit of heat soak (minimal) after a few hard pulls. Unless you're getting a trunk/engine bay tank or meth I would not recommend going smaller. Especially if the bigger throttle body adds more heat? I'm not sure on that one.
Also I hear that the equivalent crank pulley (180mm for 77mm) gives more torque than supercharger pulley so you may want to think about that option.
I have a 77mm clutched pulley and everything else you're talking about having except from the throttle body upgrade and I am still getting a little bit of heat soak (minimal) after a few hard pulls. Unless you're getting a trunk/engine bay tank or meth I would not recommend going smaller. Especially if the bigger throttle body adds more heat? I'm not sure on that one.
Also I hear that the equivalent crank pulley (180mm for 77mm) gives more torque than supercharger pulley so you may want to think about that option.
#18
Super Member
I agree Longtubes are better then mid-length headers.
#19
Senior Member
"Night and day" difference between mids and LTs is subjective at best. All else equal, you're looking at between a 20-35whp difference. To me, that's not night and day. That's marginal for the investment. Mids are $5-600....good LTs are $2600+ (MBH, ARH). I'd love to have a set of those LTs but I couldn't justify the additional $2000+ for 30hp and I wasn't putting OBX/Maximizer/PB5 on this car.
#20
Member
Thread Starter
Ya I cant believe the cost difference between long and mids. My car came with the ec mids so ya Im going to spend the 2k on pulley, bwk, cooling, etc. Maybe just maybe if I see a good deal one day Ill jump on it.
#25
MBWorld Fanatic!
"Night and day" difference between mids and LTs is subjective at best. All else equal, you're looking at between a 20-35whp difference. To me, that's not night and day. That's marginal for the investment. Mids are $5-600....good LTs are $2600+ (MBH, ARH). I'd love to have a set of those LTs but I couldn't justify the additional $2000+ for 30hp and I wasn't putting OBX/Maximizer/PB5 on this car.