We’re currently testing our production Cobalt LNF Turbo MPx lightweight crank pulley and we’re happy with the increased throttle response!

It fits well, installs in about 20 minutes with simple hand tools and its going to be VERY affordable! Ie, slightly above $100!
We’ll be releasing these for sale shortly. More details to follow.

Quick specs:
-Machined out of billet aluminum with a stainless steel crank snout pressed in
-Weighs 1.7 lbs versus the factory 3.6 lbs. This is a savings of nearly 2 lbs, which may not sound like much, but when its attached onto the crankshaft and is part of the spinning mass makes a noticeable difference.
-Same diameter as the factory pulley, so you use your factory belt.
-Does not affect alternator output, or AC output
-NO check engine lights

Pics of the stock crankshaft pulley and the MPx lightweight crank pulley

 

sweet. lets take the engine out of balance

 

yeah, wheres the damper? Google B16 N1 crank pulley... it does wonders for power... then it wipes out the oil pump... same for the piggieback underdrives for 4.6L mustangs... Not trying to bash you guys but there is a reason there is a damper there... those balance shafts dont kill all of the harmonics.

 

You know, im actually glad you said that. Your chiming in with a prevalent misconception that old schoolers seem to have.

Most modern 4 cylinder motors are internally balanced, and do not have extreme harmonics like v6's and v8's.

Furthermore, we have been selling, using and testing crank pulleys now since the late 90's. You know what? We have never heard of ONE engine failure due to lightweight crank pulleys and we have sold thousands of them.

We offer crank pulleys for the following vehicles:
95-99 Neon
00-05 Neon
03-05 Neon SRT4
08+ Caliber SRT4
08+ Cobalt Turbo

 

so this will give you quicker throttle response...?

 

if you do a black friday sale on this item, i'm down.

 

Yeah, you will get quicker throttle response from a light weight pulley. You should see a recovery of a few horsies too, possibly somewhere between 5-10hp. Thats a pretty good gestimate. ModernPerformance, Whats the dyno on these thing on a tuned LNF?

 

Sweet deal. Thanks for the quick response man

 

I had one of these on my 95 Neon ACR back in the day. That one was an under drive pulley if I remember correctly and I never had an issue with it. In fact, almost everyone I knew with a Neon had one of these one there.

Mark me down as your first customer when these are released!!

 

Btw - Im not familiar with Hondas, but I can see how some Hondas might have a problem as they have high compression (our cobalts dont) they turn extremely high rpm's (our cobalts dont).

There is FAR greater stresses on a high compression Honda motor, with long stroke, small bore piston/rod at 8500+ rpm than a low compression, turbo short stroke motor turning 6000 rpm (cobalt).

 

the idea is good but why'd ya remove the harmonic dampner? and whats the proof behind it being safe?

 

You hit the head on the nail CudaJoe.

This part will not give you 20 hp.

It will improve the throttle response and make your car even more fun to drive. You'll pick up another few horsepower as well.

Bottomline - it will be well worth the $120 we plan on it being, and it will be super easy to install.

 

When this comes for sale. I shall buy one.

 

when will they be for sale. i need one before the holidays.

 

What I like about modern, is they aren't saying anything about increased horsepower... because there isn't if anything like 1-2hp lol

They are straight out saying increased throttle response which is all it does

Kudos for not lying!

 

this.

 

Isn't that what he just mentioned having the same product out for other 4 cyl engines and never having any problems,,,

 

i'll be allllll over this

 

i'm just saying, gm performance stopped running aftermarket clutches in the cobalt race cars because the constant high rpm with a lighter flywheel was damaging engines

 

I can understand your concern, but Id like to point out a few important things.

- MRZ released a crank pulley for the Ecotec sometime around mid 2009ish? Its now almost 2011 so there have been a good amount of people with the MRZ with a lot of mileage driven.

There are even a few threads on this forum about the MRZ, and other than some leaking around the snout due to a machining problem, there have been no failures mentioned in any threads. The only problem people seem to have with the MRZ are:

-the belt they provide is a little too big, so some people have had to get smaller sized belts

-some people have had some alternator charge output concerns.

NOW, with the MPx being stock size, and using the factory belt, neither of the two concerns above will happen with the MPx lightweight crank pulley.

 

+1 when is it going to be available?

 

I remember posting a TSB about lightened flywheels and crank pulley's ......something about misfires .

I've read a review from someone who did the MRZ pulley and he swore it was a noticeable difference in performance , he posted 6 months later with no problems with it ..... just a heads up.


EDIT: Found it .... now this could be a true concern OR GM just trying to blame something they cant find a fix for . My stock LSJ had an Idle misfire since the day it was new , it wouldn't set a code but I could see it on a Tech 2 . So take it for what it's worth .....

Subject: Ecotec Misfire DTC's With No Concern Found- Inspect for Aftermarket Components

Models: 2004-07 Saturn Ion Redline
2005-07 Chevrolet Cobalt SS
With 2.0L Supercharged Engine (RPO LSJ)
2008-2010 Chevrolet Cobalt SS
2008-2010 Chevrolet HHR
2007-2009 Pontiac Solstice GXP
2007-2009 Saturn Sky Redline
With 2.0L Turbocharged Engine (RPO LNF)


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A technician may comment of MIL lamp on with DTC's of P0300, P0301, P0302 or P0304. They typically report they cannot determine a root cause. This concern (misfires) usually occurs with extended idling and may be reduced/eliminated by raising the RPM slightly or inducing an engine load (such as A/C).

Recommendation/Instructions:
Engineering has determined that aftermarket parts (such as a light weight aluminum flywheel or accessory belt drive pulleys) can contribute to this issue. Anytime any portion of the rotating assembly is changed to an aftermarket component, there is a potential for this concern. When diagnosing a misfire DTC and no concern can be found following eSI, the technician should inspect for aftermarket components installed. This concern (misfires) usually occurs with extended idling and may be reduced/eliminated by raising the RPM slightly or inducing an engine load (such as A/C).

 

Will be available within the next week and half or less. We've already got a good amount produced.

 

put me on the list to get one..

 

pm you mpx, please reply.