Hey

Just ordered a 5.8 class 1 motor from jaspers.

? will the modified cam for towing have any effect on the speed density.. Is there anything else i shoud know..

Thanks

Al 91 f 150 5.8

 

The towing cam Jasper uses is just a rebuilder cam, its not radical at all, and doesn't have much overlap at all, therefore it will work fine with your existing EFI system with no worries.

Do know the first time you start it, the EEC will have to re-learn the new engine, so it may not run "perfect" instantly, but after some idling, the break in, it will have enough data to run your engine correctly. Don't worry about it, its entirely normal.

 

frederic

Thank you for your promt reply . I tow a Boston Whaler every once in a while and a little trail blazing the added tourqe will be nice..I here some reservations on the Jasper motor (351 W). How do you feel about the Motor. My old motor has 165,000 and all the leaks to go with it, not to mention it is a real pain to have the thing inspected. do to some egr and vacume problems..do you think ther will be a noticable differance in drivability..and realiability.
Thanks in advance

Al

 

Well, a new or rebuilt motor (if built correctly) will have less blow-by due to the new rings, new cylinder wall surfaces et al, as well as "new" bearing clearances all around, so yes, the new motor should run much better than an older tired motor.

If you live in a state that has emissions testing, well, you're going to need to fix all the EGR, vacuum stuff, etc, more than likely. It depends on your locality's rules and regulations.

For example, here in NJ, they have the rolling dyno test, which is very close to CA emissions requirements (not quite, but darn close). My F350 crewcab is registered is a 10K GVWR vehicle, rather than its actualy 9.8K GVWR, therefore considered a "commercial vehicle". Which makes registration costs slightly higher each year, but the truck only has to pass an idle test. Which any vehicle in a mediocre to excellent state of tune can pass if the vehicle has a large cat installed. While my EGR still works, the rest of it pretty much is just there for show and tell. Its non-functional, simply because I'm swapping in a different motor in the spring and too cheap to fix the rest of the emissions stuff, knowing its leaving in 4-5 months.

Loopholes like this are useful Maybe your state has suck loopholes to take advantage of? If not, well, you should fix all the emissions stuff. Most of the trucks with EFI tend to perform better, and run more reliably with the emissions stuff working, anyway.

As far as Jasper goes, I've been involved in no less than 11 swaps that resulted in a Jasper engine being put in. One of the 11 was defective, and had to be exchanged under warranty. Turned out to be a minor issue too, when it was assembled, they forgot an oil pump gasket, so pressure was lost as the oil was pumped out of the sump, through the oil pump, then sprayed the inside of the oil pan. An honest mistake, and Jasper was very good at making good on their warranty. They didn't just send us new gaskets, which my friend appreciated. Just took 9 days from when he called to complain to when the new engine arrived, just because its an uncommon oddball and they didn't have it sitting around in a warehouse apparently.

Other than that one incident, I believe the other 10 jasper engines are still on the road, or died with lots of mileage on them.

Just make sure after installing the engine, you follow their break-in procedures exactly. Not because its "best", but because if you do have warranty problems down the road, you can assure them (and yourself) it was not due to anything you've done. Like most companies, thats the first question they ask... "did you install it correctly, did you break it in per our instructions, etc".

 

frederic

Again thank you for your input.
I live in long Island NY and believe the emmissions test is tough.
I will have the EGR problem solved before the new engine is installed.

Thanks again and will let you know how i made out..

Wind at you back

AL

 

Oh, naaaah, solve it when you put the new motor, just to make sure everything fits right. At least that is what I'd do. More than likely its just the EGR unit itself, and possibly the tube that comes out the bottom of it. Very likely to be rusty, rotted. When I replaced my EGR, the tube underneath disintegrated into a powder. Didn't require a big hammer

 

Got Ya


Al