I fianlly got tired of waiting........

[bszopi]

I have pictures as well as a rough writeup Chris did. I could put togethter an article if need be.

Steve has my checking pushrod, so if he hasn't checked his yet, you could possibly do it as well. Or at least take some more pictures.

[fierofanatic88]

Comp told me that I should be able to use my stock PR's because very little was taken off the base circle.
bszopi
Did you use your stock springs or did you upgrade those as well?

[bszopi]

I used everything stock, including the pushrods. I was going to upgrade to a different size pushrod (the reason for the adjustable check pushrod) when I thought I had a failed lifter (or several). I then swapped in the 3400. Upon disassembly of the 3100, I didn't find anything wrong. The lifter(s) had probably just bled down. Who knows...

EDIT : WOOHOO!! Post #45,000!!! Kinda funny that I got it. Maybe I'll let someone else get 50,000...

[Froggx]

Re: RE: Re: RE: I fianlly got tired of waiting........

You cannot change the LSA though.

According to my cam card from Crower my LSA grew by 2° to 114° over the course of my regrind.

[SappySE107]

RE: Re: RE: Re: RE: I fianlly got tired of waiting........

Its possible to offset grind the lobes and change LSA slightly. Welding would allow a greater amount but then again, thats a lot more work as well.

[Froggx]

RE: Re: RE: Re: RE: I fianlly got tired of waiting........

Well, looking at my cam it was pretty obviously not welded, and it did not have a huge extra cost to offset the price of welding, so I assumed it had some kind of offset grind. I wish I had taken pictures of the cam before I dropped it back in the motor, it had drastically more agressive ramp angles after I got it back.

[fierofanatic88]

Here are a couple quick pics....
I posted them on PFF because I dont have access to pic hosting.Here is the link

http://www.fiero.nl/forum/Forum1/HTML/050564.html

[CNCguy]

I could be wrong here but it would only be logical that the pushrods would need to be longer by 1/2 of the amount taken off the base circle. This would not be an exact measurement due to the angle of the pushrod but should be within .003 from my calculations which should be fine for hydralic lifters. I made a little drawing of a regound cam vs. a stock cam as an example. In this example the lifter would set .04 lower in the block requiring a pushrod that is .04 longer.

From the drawing you can see that the more they take off the Base Circle the more duration and lift they can get and by taking some off of the highest point they can change the LSA.

This drawing is not perfect, just an illistration since I did not know the stock Base Circle. Lift is mutiplied by 1.5 or 1.6 depending on your rockers and the degrees duration is doubled since it is measured in crankshft degrees.

Just my .02
Marc

[AaronGTR]

Yeah, I don't think he'd have to get different pushrods with that amount of change. It shouldn't change the geometry enough to need it. 0.04" is less than 1/16" too and some pushrod places won't even make changes smaller than that.

[fierofanatic88]

Well it doesnt look like I am going tobe able to finish my swap in my Fiero so I wanted to see if there was anyone interested in my regrind. My wife recently had our second son and I was hoping to have had the cam back three weeks before it showed up. That really screwed me as far as timing for the whole thing. Now it doesnt look like I am going to have time to do it at all. I know I should put this in the Classifies but seeing as though people are reading this I wanted to see if anyone was interested in this regrind. All I want is what I paid 125 and its yours. This cam came from a 96 monte just incase you need to know.I know that that there was a later change in the gear and sensor but I think this wiil fit just about any 3100 or 3400 right? Well LMK if anyone is interested.IF not I'll ship it off to Ebay.

[Rhedalert]

Ooh tempting!!!

[fierofanatic88]

Ooh tempting!!!

Actually I have a whole 2000+ Top end, heads, adapter plate to allow the old egr to be used on the newer Intake plus the cam I'll be selling if that adds to the temptation at all. I'm going to add the other parts to the classified section.

[Rhedalert]

I have all that running already at this time- heads, lower/upper, and egr adapter. What's the exact specs of the cam, like max lift at the intake lobe and the exhaust lobe? Can you post the cam card?

[fierofanatic88]

Everything from the cam card is listed earlier in the post. The lift is .46 w/ 1.6 rockers. Increased from .430. O page one halfway down I posted the info on the cam card. My scanner isnt working correctly and pictures dont com out well.