5 GT Turbo c1j pushrods thread.

[Clarkey]

If I were doing a big power C1J, I would use a billet cam, not a recut, to reduce the pushrod length problems.

We need a new thread for pushrods.....
Some good points there Dave, I have some longer adjusters but not needed yet as still have the longer pushrods.
Been back to standard length this year due to reducing the pedestal height on the rocker assembly, which brings the pushrods away from head.
I thought we had solved the problem until Donington where we bent a few.

keep the wife happy.

That's the main thing, then you can play cars

All of my pushrods have witness marks on where they have caught the head so the hole definitely needs opening up. Still all these years and i have not actually managed to bend one yet

Your not trying hard enough

 

[Mark Davis]

8mm will definitely need the head opening up.
The more lift on the cam pulls the rods closer to the head.

So not a case of simply swapping with current push rods? Would need some fettling?

 

[Clarkey]

So not a case of simply swapping with current push rods?

Very much doubt it Mark.
Next time you have the rocker cover off, look at the space between the pushrod and head. to the head

 

[Clarkey]

I am sending off one of my 178mm pushrods, (5mm longer than oe) follower and adjuster to get correct fitment for ball and cup.
The pushrods will be 8mm tube design. Once I get a confirmed price, will post on here.

Have found these, standard length but over £200 !!!!! but you get the idea.

 

[Mark Davis]

I am sending off one of my 178mm pushrods, (5mm longer than oe) follower and adjuster to get correct fitment for ball and cup.
The pushrods will be 8mm tube design. Once I get a confirmed price, will post on here.

Have found these, standard length but over £200 !!!!! but you get the idea.View attachment 18040

@Clarkey where did you find the £200 ones? Do you have a link ?

 

[Fordy]

Ruanovo performance or something like that.

I've brought some radius gauges so I can measure the ball and cup of a standard rod.

Then I'll buy a push rod "checking" rod and see what length I need for my engine

 

[Clarkey]

@Clarkey where did you find the £200 ones? Do you have a link ?

Don't go rushing in Mark
Reinforced pushrods kit Renault 5 Gt Turbo

Been translating and basically if you send a set of rods its £218 and don't send rods £265....!!!!!!!!

Ruanovo performance or something like that.

I've brought some radius gauges so I can measure the ball and cup of a standard rod.

Then I'll buy a push rod "checking" rod and see what length I need for my engine

I have sent the rod and adjuster so hopefully have some answers soon.

Strange how some people run the standard length rods, I never had enough adjuster until I got the longer rods.

 

[Fordy]

so i measured the radius to be inbetween 3 and 3.5mm on the adjuster and push rod end and cup, tbh i think its a 1/8 radius which is a little over 3mm at 3.1750mm

from a quick googling and skim through catalogs, smallest americans go down to is a 5/32 which is 3.9688mm radius

 

[Clarkey]

Fingers crossed then. I was originally going 6.5mm (1mm oversize) diameter, he was happy to make something custom until I changed my mind.
Ruanova use 8mm so decided to go with that size.

We will be opening up the head for more room anyway.

 

[Mark Davis]

I'll hold fire @Clarkey

 

[Clarkey]

Longer pushrods.



Longer adjusters I had made,

 

[Mark Davis]

Who did these for you David?

 

[Clarkey]

Sid Dawn was making stuff for the 5, I asked for these and he obliged.
I've never ran them as got the longer pushrods.

 

[DaveL485]

Is that a stress fracture about an inch down the longer pushrod bud?

Do the longer rods change the pivot point enough to help with the head fouling issue at all?

 

[andybond]

Is that a stress fracture about an inch down the longer pushrod bud?

Looks like a cut and shut point to me that rather than a fracture

 

[Clarkey]

Not sure about that mark, it's on both sides of the rod.

The longer rods have not helped with this cam fouling the head.
We are pulling the engine out next week so will get some pics of the witness marks on the head.

 

[Mark Davis]

I also have the same mark on some of my pushrods too. Noticed the other day.

I'm wondering if forking out £200 odd on those ones linked above is worth it. But hoping the elongated holes on head help.

 

[Clarkey]

I also have the same mark on some of my pushrods too. Noticed the other day.

I'm wondering if forking out £200 odd on those ones linked above is worth it. But hoping the elongated holes on head help.

The above link for the pushrods are on an exchange basis Mark, if you don't send a set of rods closer to £300 with delivery!!!!

I have sent a rod and adjuster to Trend Performance in America.
I have had discussions and they want to do 8mm tubular, not sure if we have enough room , seeing how much we can elongate the pushrods holes.
They can turn down the 8mm but as they are tubular, it wont be much, due to making the walls too thin.
I have been quoted £17 per rod, not sure on delivery etc yet.

 

[Clarkey]

You can see how close everything is on the head and the marks where pushrods touch.

 

[DaveL485]

What about making the pushrod so that the cup sits offset from the rod, pushing it outward? Would increase stiffness too.

 

[DaveL485]

(Design skillz or what)