TORSPD: NEVR

I found a dealer who would be willing to do a gb for cams. He is calling kelford later today when they open and will get back to me with details.

 

So I have a little bit more detail 4 my friends cams. I will update in a few minutes.

 

So what he's found is that the '03-'04 1GR heads, from the 4Runner, have a thicker casting than those of the '05+ Tacoma 1GR. 4Runner 1GR engines are made in Japan. So there are slight differences than the Tacoma 1GR's. I am not sure where the Tacoma 1GR's are made. The point is, that the first year model 1GR's have a few differences and need to be checked, for clearances sake.

That being said, the lobes on the Kelford Cams are obviously taller than those of the OEM cams. His build is on an '03-'04 1GR, and therefore the casting of the oil retention areas around the shim buckets, needs to be clearanced. As referenced in this picture.



Might no be necessary on the Tacoma 1GR. It would still need to be checked to be thorough.

Now, this is not a recommendation. This is a requirement. Beehive or dual springs are REQUIRED!!!!

During testing of clearances, to check valve lash and operation, the oem springs fatigued. This from simply rotating the cams by hand. They did not return to their full stroke or height. OEM springs cannot handle that lift of these cams which I posted the part number for. Valves are fine, but springs MUST be upgraded. Either from Kelford or SuperTech. Regardless of year model 1GR.

 

WTF its been 30 minutes @Torspd . Way to keep us on the edge of our seats for so long.

What about the cam gears that come with UCON? Is that different or the same of what we're talking about? Better or worse than kelford?

 

Oh....posted right when I did LOL.

 

Those would be removed, as the cams were designed with the OEM cam gears.

 

Twice at that. Lol.

 

Yeah I dont understand internals, yet. I need to do some reading.

 

Fawk dude. I make it Sesame street easy for everyone.

 

True lol but I want to learn how an IC engine works. If I can learn how pumps and turbines work, an engine shouldn't be far off lol

 

So will retune be needed going back to oem cam gears with kelford cams and URD boost set up?

 

Doubtful if you have a UCON or APR X1. Unless a data log shows that you are surpassing the duty cycle of the injectors do to more engine power output. Due to the nature of that tuning device. With a Maf Cal or another device, a potential return would be necessary.

 

Funny cause a friend and i were just looking at some dual springs on the LCE website. Crazy how just by turning it already fatigued the oem ones.

 

Granted they were aged springs, as well as had a lot of miles. That was the same response I had said as well. Although it is already common knowledge that with increased lift you'll need increased stiffness springs, which are designed to handle that compression without binding the coils. As well as preventing valve float.

 

Are you running the beehives? I do not like the idea of the dul springs. Seems like there would be alot of friction betwwen them are rubbing surfaces.

 

I have dual valve springs in both of my built engines' heads.

 

So what will be a better cam for a urd sc set up. the L49, L103 or the L132X/L74I? trying to figure out the pros and cons of each.

 

Well I can say this for certain. The L49, and L103 both have more lift and more duration than mine and the L132X. This means that head work is absolutely necessary for lobe clearance.

What I am not certain of is if the intake and exhaust durations are the same, as on one duration reference is supplied.

276 for the L49 and 280 for the L103.

For those curious where these numbers are coming from, here is the website.

http://www.subzeromotors.com/category.php?id_category=269

 

In the drop down to the left, in the link, search between 1GRFE (V6) and 1GRFE Fj Cruiser.

 

Also, those prices are higher than what my friend paid.

To get more accurate data, emailing Kelford directly, about those three cams would be the best source. Not Sub Zero motorsports. They are just used for reference.