Question for guys who actually have the the Roush Kit

[03Terminator&2020S550]

Great numbers! What's iat2 looking like at the end of a pull?

Im kind of shocked the porting provided that much efficiency gain. Wouldn't expect that from the manufacturers these days

I have same exact setup making 940 on the 2.8" pulley can you save me the headache and tell me what size belt and tensioner pulley made the 2.7 work kept getting belt slip.

If you have the time I would really appreciate the information I own the 2.7 " and tried even my shop tried made inconsistent numbers due to belt slip also doing a 75 shot with it if I could get 970 it will be a 1055whp car give or take. Please let me know that is really my goal.

2020 S550 Joker's ported with the Joker's kit intercooler and all. The Dob super single heat exchanger and the ice tank so I am going to get nice IATS with the 75 shot. Kooks longtubes fore return fuel system E85 any help would be greatly appreciated!!!

 

[03Terminator&2020S550]

This is from dyno testing. Roush 2650 ported by Joker. Stock 6 rib. 2.7 pulleys makes more boost than a 2.5.

Nice numbers brother I have the same setup on the 2.8" pulley made 850whp what size idler pulley did you use my 2.7 pulley made 940whp but was slipping to much you would really help alot if you can tell me what idler pulley works appreciate it in advance going with a 75 shot soon should make 1000whp+

 

[The Watchman]

Nice numbers brother I have the same setup on the 2.8" pulley made 850whp what size idler pulley did you use my 2.7 pulley made 940whp but was slipping to much you would really help alot if you can tell me what idler pulley works appreciate it in advance going with a 75 shot soon should make 1000whp+

I know your comment was not directed towards me but lemme recommend you go with a 8 rib setup especially if you go NOS.

 

[03Terminator&2020S550]

I know your comment was not directed towards me but lemme recommend you go with a 8 rib setup especially if you go NOS.

Can you tell me what size idler pulley I will need for the six rib for now? I do plan on going 8 rib after I do the phase 2 with a 75 shot and built transmission.

 

[03Terminator&2020S550]

Can you tell me what size idler pulley I will need for the six rib for now? I do plan on going 8 rib after I do the phase 2 with a 75 shot and built transmission.

Running the 900052A idler with the 2.8

 

[The Watchman]

Can you tell me what size idler pulley I will need for the six rib for now? I do plan on going 8 rib after I do the phase 2 with a 75 shot and built transmission.

Jokerz will tell you everything you need to know. Just reach out to them directly?

 

[03Terminator&2020S550]

Thank you that's a good idea!

 

[03Terminator&2020S550]

Jokerz will tell you everything you need to know. Just reach out to them directly?

I reached out to them didn't get a response cause the weekend but I am seeing 100 mm seems like alot adding 10mm for .1" but I will hopefully hear from them Monday.

 

[The Watchman]

I reached out to them didn't get a response cause the weekend but I am seeing 100 mm seems like alot adding 10mm for .1" but I will hopefully hear from them Monday.

Jokerz is located not too far from me and they will definitely respond eventually.

I believe they have a very active presence on Social Media as well so you may consider reaching out that way too.

Also, @DRP Motorsports will be able to give you some good advice.

As always, @beefcake is a excellent resource too!