70 gsconvt

Hi, I'm going to be building an LQ4 stroker. So the engine I'll get as a core will probably have a 24x reluctor wheel. But when I order my stroker kit, I can get either one. I'm also just going to be getting a new stand-alone harness/ecm setup.

My question is, is there any advantage to the 58x reluctor wheel over the 24x wheel? Why did the factory change? Would there be a horsepower benefit? Or just a smoother running engine? Or did the factory just need something to do that day?

Gray86hatch

iTrader: (83)

58

it is a better design. 24 is a 2 piece wheel and 58 is 1. it will be more accurate

Tim

litle88

iTrader: (20)

It's really gonna be what PCM your gonna get. If the pcm reads a 24x reluctor wheel then get a 24x wheel on the crank. If your PCM reads a 58x wheel the crank must also. If you have a 58x wheel and your PCM reads a 24x wheel Lingenfelter has a conversion Box fOr you. There are no hp benefits AT ALL.

Matt0matic

What are the benefits to the 54x wheel?

70 gsconvt

Well, like I said, I'm going to be getting a stroker crank and I can get either one. And I'll get a new wiring harness meant to go into an older car, and they ask which one I want also.

I'm just trying to see if there is a benefit in going with one over the other. There's no cost difference. As stated above, I'm guessing a better signal because of the greater number of teeth on the wheel.

I was just wondering if it helps out at all with the horsepower. I'm all about learning about all the little tricks. Two horsepower here and four there can add up pretty quick.

S10xGN

iTrader: (11)

It's my understanding that the 58x wheel has better resolution, a cleaner signal, and is capable of more revs before breaking up.

litle88

iTrader: (20)

Lol I forgot to type what I wanted to include lol sorry Im at work.

It's just a design change that GM made in their engines. The 58x gives more accurate readings to the PCM for RPM and crank angle. That's all no hp gained really that I can see.

jasond26

iTrader: (22)

I personally running the BS3 for LS7(58) and I have taken my engine to 8200. The rpm line was clean and crisp. I know with aftermarket engine management systems the problem seems to be resolution loss at higher rpms. I think a lot of that has to do with the design of the wheel. Like mentioned the 24 is 2 piece and 58 is one piece. If you are getting a callies crank I just heard that you can request a billet one piece wheel in either config which should clear up those problems. I think LMR offers one as well.

70 gsconvt

OK thanks. Sounds like I may just go ahead and do the 58x wheel.

Jason Haines @ LPE

The 58x actually has less position information for the ECM compared to the 24x wheel. The 24x wheel is actually two wheels with two different patterns. To make up for the lost position information on the crankshaft reluctor wheel GM added additional position information to the camshaft reluctor wheel.

The two will make the same power. More aftermarket engine management systems can understand the 58x crank wheel (60 tooth less two teeth) but several aftermarket systems can understand the 24x wheel now.

If you want to be able to go to mechanical throttle using OEM electronics then you want the 24x reluctor wheel. None of the GM ECM's support mechanical throttle and 58x. On the other hand you can do electronic throttle or mechanical throttle with the 24x reluctor wheel.

If you want to control an electronic transmission you can get a single module (a Powertrain Control Module, PCM) to control the engine and transmission. With the 58x crank you will need an ECM and a TCM.

On the other hand if you want to run the newer 6spd automatic transmission (6L80 or 6L90) then you will want a 58x crank because the T43 TCM that controls those transmissions is normally combined with a E38 or an E67 ECM (both 58x ECM's).

Lots of other small plusses and minuses exist for each but in the end you can make either one work in most custom applications.

Hopefully some of that information is useful and I haven't made this more confusing.

Mike454SS

iTrader: (4)

Why don't you decide what hardware you want to run around the engine, and allow that to decide what reluctor wheel.

Also, if you pick a 58x wheel, you will need a newer timing cover with provisions for a cam sensor, and then you'll need a 4x cam sprocket in your timing set. If you pick a 24x crank, you can use the block mounted cam sensor that the donor gen 3 engine comes with, and it won't matter what cam sprocket pattern you choose.

INTENESS

iTrader: (4)

The billet reluctor wheel is the way to go,the two peice design of the 24 wheel is crap there made in china the rivets that hold them together are cheap.LMR makes a billet one thats what o went with nice peice and peice of mind.

70 gsconvt

I will be putting in a T-56 Magnum transmission. As far as a throttle, I hadn't decided between a drive-by-wire or cable. It doesn't make too much difference to me. I do like the old school mechanical connection of the cable, but I realize that if a DBW is good enough for a Corvette, it should be good enough for me.

nobreaks254

iTrader: (50)

does anyone have the tool to change the wheel? I need to change the wheel on my ls7 crank to 24. I would like to rent the tool if possible

Jason Haines @ LPE

We made our own and we don't loan it out (maybe we need to look into renting it out along with some of our other custom tools).

Goodson sells one. I don't know if they offer rental.

trevmust

with a DBW petal can you set the resistance? or is it a flimsy piece of shart?