Whipple Gen 5 Smallest Pulley on Gen 3 Coyote

[Jed S.]

Does anyone know what pulley size is recommend on an 18 gen 3 Coyote with a gen 5 Whipple? Have OPG&CS, 1 7/8ths cat-less headers, and will be buying a return style fuel system to feed the extra boost with E85. Right now I’m on a 3.875 and making about 800 rwhp on E85 with a dw400,BAP, & 1050x’s. Graci...

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[Furious18]

Depends.. how big your balls? You could pulley it to the moon and use a griptec if you’re ok with popping it

 

[ugstang17]

Maybe better off going to an OD crank pulley. Talk to your tuner. They know best.

 

[Jed S.]

On the 6 rib set up still, and ain’t trying to pop it lol. Saw the griptech pulleys were on sale today and wanted to figure what size I should buy. Tuner didn’t respond since it’s after 5pm so was wondering if anyone knew. Was thinking a 3.5/3.625/3.75. So pretty much +1/2/3 lbs More boost over what I have now.

 

[Furious18]

On the 6 rib set up still, and ain’t trying to pop it lol. Saw the griptech pulleys were on sale today and wanted to figure what size I should buy. Tuner didn’t respond since it’s after 5pm so was wondering if anyone knew. Was thinking a 3.5/3.625/3.75. So pretty much +1/2/3 lbs More boost over what I have now.

There’s a guy running a 2.85 (I think) griptec on a 6 rib that was on the verge of cracking 8s. You should look for the thread. He talks about belt shredding and what size started to slip.

 

[engineermike]

I’ve run down to 3.625 on 93 and the logs looked ok. I personally wouldn’t leave it like that permanently on 93 though.

 

[Drsmith33]

I’m on a 3.25 right now and haven’t had a single issue yet. Griptec is the way to go for sure! Zero belt slip

 

[HRSEPLA]

Once you do the fuel system, you can run any pulley that your tire and suspension will handle. Anything in the mid/low 3.X" will feel awesome! Pullies are cheap, I went incrementally to see what each one would net.
I now run the 2.85 Griptec and love it. I have not shredded any belts but I also keep fresh ones on it. (Disclaimer: My stock engine is on borrowed time but hanging on)

 

[Jed S.]

Once you do the fuel system, you can run any pulley that your tire and suspension will handle. Anything in the mid/low 3.X" will feel awesome! Pullies are cheap, I went incrementally to see what each one would net.
I now run the 2.85 Griptec and love it. I have not shredded any belts but I also keep fresh ones on it. (Disclaimer: My stock engine is on borrowed time but hanging on)

Damn, how long you’ve been running on that? Also what’s the eta/rwhp on your setup? I was thinking the lowest I’m gonna go is a 3.5-3.625 until I sleeve/rod/piston the engine. Already gonna be high 9s with my setup on a 3.875 pulley so anymore it gets super expensive with safety shit haha

 

[Peedystablo82]

I’m on a 3.25 right now and haven’t had a single issue yet. Griptec is the way to go for sure! Zero belt slip

Yeah I am on the 3.25 pulley pushing roughly 1K whp with the standard Whipple pulley. No belt slip at all. I might be pullying down soon to see what this baby can take.
I'm seeing 15.9 psi right now.

 

[Jed S.]

Yeah I am on the 3.25 pulley pushing roughly 1K whp with the standard Whipple pulley. No belt slip at all. I might be pullying down soon to see what this baby can take.
I'm seeing 15.9 psi right now.

I ended up getting a 3.5 Griptec (14.0psi). Gonna be dynoing it soon and am wondering where I will be. Thinking south of 900whp.

 

[Peedystablo82]

Yeah I dynoed 958whp at 7300rpms and 817 torque at 4500rpms with this setup. This was in 6th gear on a mustang dyno.

 

[Brent Davis]

3.625” and 20% OD, Gen5 made 980 RWHP. Almost threw the 3.5” on for a 1000K glory pull but just didn’t want to chance the stock engine any further.

 

[Peedystablo82]

I'm still on stock balancer, but I'm moving down to the 3.0 pulley next week after my trans is completed and my ice tank is done. Send it!!!!

 

[Teamlovell]

I’m on a 3.25 right now and haven’t had a single issue yet. Griptec is the way to go for sure! Zero belt slip

Do u leave 3.25 on all the time or just at the track

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