FieroGT/4E introduction (Page 7/13)
sleevePAPA JUL 06, 01:50 PM

quote
Originally posted by fierogt4e:


Dobey;
Don't let the logical side of my brain hear you say that.

To myself; It is a budget build. Yes definitely, definitely!

sleevePAPA
“Good luck finding a cam with the larger journals, comp wont even touch it. Schneider maybe. But if you find someone who will grind a cam to fit the larger LZ journals and not cost a small fortune, let me know, i'll sell the brand new WOT Tech turbo grind and bearing spacers.”

A poster on one of these forums said he asked comp for a 3400 cam with large journals and they said yes they could but he didn't make the perches. So...
I have no solid plan “yet” for the cam but... I may get 1st gen. Roller and shrink sleeves on it, then finish turn and polish to size. I might run a drive off the cam thru the timing cover for a position wheel. So the reason for the remote pump. Subject to change at any given moment.



I guess it depends on who they talked to. Talking to one of the salesman over email, they wouldn't budge after I told them what engine I was using, regardless if it needed to be VVT or not. Then I called the tech line and they said it would be a custom billet and couldn't manufacture the 3400 cam with larger journals. I hope you get further than I did, though.

Also, I looked into those nascar rods, I'll go that route but it seems I can only find rods that have the Honda size journal(1.88), a BE of 2.01". Where can I find the chevy journal rods with the 2.100 journal size?
fierogt4e JUL 06, 07:42 PM
OK don't go psychotic on me now.

I know this is not what you thought you would see.

No you can NOT use them as you see them.

The shafts need to be removed from the rockers. And “new” shafts install to use them separately.

The file test said the shaft is quite hard so I may not be able to cut the shaft in half.

The OD of the bearings in the new ones seem to be about the same as the old ones.

They will have to be taken apart to get a real size.

The main part of the new body is 1/64th larger than that of the old one.

New pedestals will need to be made

To revue; stainless Steel. 1.7:1, LS, full roller, pedestal mount, adjustable, (china) procomp electronics, $108.50 shipped.

I still think I can make these work. But I need to take them apart to measure everything.

Can I put the shaft and bearings from the old in the new???

http://www.ebay.com/itm/Che...AOSwVllXHfwC&vxp=mtr


------------------
Sincerely
George

ericjon262 JUL 06, 07:53 PM
my big concern with those would be lower intake manifold clearance on the pushrod end.
dobey JUL 06, 10:05 PM
If the bearing dimensions are the same on the V6 rockers as on the LS rockers, then you can probably use the shafts from the V6. I don't know what the quality of the bearings on those is, but I can tell you that the common failure point on the stock LSx rockers in high lift applications is the bearings, which is why the trunion upgrade from Comp/etc… exists. If your new rockers have the same parts that are used in the trunion upgrade kit, you might have gotten a decent bargain there, assuming the rockers themselves aren't made from bad steel.
fierogt4e JUL 07, 01:27 AM

The bearing for the V6 rocker is .812 (13/16) OD the new ones are .875 (7/8). So no crossover there. But what is the OD of the bearings in Comps up grad kit??? Or in an LS rocker ?
They do clear the LIM, but just. The valve cover rail will make adjustments difficult.
I would like an adjustable pedestal mounted rocker so a phone call to Comp, about there up grad kit, may be in the future. Can I get it for just one at first ?
exoticse JUL 07, 03:55 AM
Love the videos and the overall project, keep 'e coming !
dobey JUL 07, 09:01 AM

quote
Originally posted by fierogt4e:
The bearing for the V6 rocker is .812 (13/16) OD the new ones are .875 (7/8). So no crossover there. But what is the OD of the bearings in Comps up grad kit??? Or in an LS rocker ?
They do clear the LIM, but just. The valve cover rail will make adjustments difficult.
I would like an adjustable pedestal mounted rocker so a phone call to Comp, about there up grad kit, may be in the future. Can I get it for just one at first ?



The upgrade kit is for the LS rockers, and I think is the same hardware they use in their full LS rockers, so probably 0.875 too. Measure the shaft instead. The bearing OD might be larger for the LS, but if the ID is the same (ie, the shaft diameter is the same), then the shafts should be usable in the LS rockers.

I don't know if you can buy a set for a single rocker, but it's possible. Check their web site or call them.
fierogt4e JUL 09, 12:18 AM
Exoticse;
I showed my son your post. He dose all the recording, editing and posting of the videos. We thank you
Maybe Sunday we can get the 1st one up of the engine.


SleevePAPA;
This should show you a wide rang of rods. All 6.125 C to C, 2.100 BE. Look for .927 SE so you can use ls pistons.

http://www.ebay.com/sch/i.h...5+2.100+rod&_sacat=0

Here is my first look at rod length, piston compression height, and stroke combinations.
(Info has changed so math may be off.) I'm looking for good info everywhere.

3900. crank, rod, and pistons

stock cylinder head deck height 8.818” 224mm
stock stroke 3.307” 84mm
stock bore 3.8976” 99mm
stock compression height 1.337
stock rods 5.827” 148mm
stock head gasket (measured at .065) .055” .6560ci
stock cylinder head volume 36.cc 2.1968ci
piston dish, custom 15.cc 0.9153ci
total combustion volume 3.7681ci
one cylinder volume, stock 39.4442ci


rod length / compression height / rod to stroke ratio

5.7” rod + 1.395 c. h. = 3.447 stroke* 1.653 rr low end only
5.827 rod + 1.337 c. h. = 3.307 stroke stock 1.762 rr
6” rod + 1.165 c. h. = 3.307 stroke no rod? Turn journal? 1.812 rr best
6” rod + 1.110 c. h. = 3.416 stroke OK 1.756 rr
6” rod + 1.095 c. h. = 3.447 stroke*# OK 1.740 rr OK
6.125” rod + 1.053 c. h. = 3.280 stroke 1.867 rr
6.125” rod + 1.073 c. h. = 3.240 stroke**## 1.890 rr, high rev.s no low end 302ci Chevy

* A 3900 crank with the journal turned down to 2.100” and offset to the max stroke, less a .005” clean up is 3.447”.

** A 3500 crank with the journal turned down to 2.000” and offset to the max stroke, less a .005” clean up is 3.240”. This is a good way to reduce rod journal weight for higher rev.s. Strength is the question.
Small lighter journal = smaller light rod end =less counter weight = faster spin up

# One cylinder W. 3.905 LS bore = 41.3043ci. 12.9 compression 4.01L

## One cylinder W. 3.905 LS bore = 38.8240 ci. 11.3 compression 3.77L

---
So this is just how I started. Then I ran them on Desktop Dyno. To see how they looked

http://www.jegs.com/p/Comp-...o-5/1200810/10002/-1


------------------
Sincerely
George

[This message has been edited by fierogt4e (edited 07-09-2016).]

sleevePAPA JUL 09, 10:07 PM
I was looking at the 6.125" rod along with the 3.905" bore pistons from carrillo. A CH of 1.035" and 18cc dish volume.

That will put the compression at 10.96 with the piston in the hole .0045"

A bit more compression than I wanted for boost, but it has been done. That's about the best combination I could find so far, I wish they were offered with a larger dish. Looks like a nice meaty top land, though.

*edit* Found a set from wiseco with a 1.050" CH, and a 30cc dish, 3.903" bore. That will put the SCR in the 9.72:1 range, pistons out of the hole 0.0105" and a quench of 0.041". Seems to be the best off the shelf option as of right now.

Are those specs from the net findings, or have you measured?

http://60degreev6.com/forum...page2?highlight=3900

[This message has been edited by sleevePAPA (edited 07-10-2016).]

fierogt4e JUL 10, 09:09 PM

SleevePAPA;
“Are those specs from the net findings, or have you measured?”

Most are from the net but I am trying to confirm the ones I need.
My stock rods are 5.827”
The wrist pins are all offset to the major thrust side .0315in (.8mm).
stock used head gasket measured at .065”. Over all. Steel parts only .008, .008, .037 The plastic embossing is on both sides of the outer shims.
The stock compression height is 1.305 on this one.

I misunderstood the Cometic site so I took a second look to see how everyone was getting a .051” thick gasket. OK now I see.

The block is ready to hot tank. Then take to work for measuring.

After I decided on a piston I Got a price from the big 3. Then took the part number and put it in a search engine. (Bing) and found them at a $225 savings. nothing on the first page helped. It took some time to find a good price on the rods ($60 off) but a friend hasn't picked up the C-10 parts yet so I'll keep looking till he pays.

------------------
Sincerely
George