This "F" head is a later type, with the raised intake ports.
Time to get it cleaned and pressure checked


current short radius.....

more to come......

Rogue-AE95 wrote:I was hoping to see you attack one of the 2nd gen 4A-FE heads someday. I have one sitting atop the 7A-FE I bought to make a 7A-G(T)E, and wondered if it would be better or worse than the 1st gen head for building up a turbo'd economy engine.
Those 2nd gen intake ports are so steep.
Rogue-AE95 wrote:
Those 2nd gen intake ports are so steep.
Rogue-AE95 wrote:Cleaned up casting, like you do with the G heads? Or was it that nice from the foundry?
oldeskewltoy wrote:What do I see........????
Rogue-AE95 wrote:Interesting. Is it advantageous to have the ex valves like that?
What (or who) is this head for, if I may ask? I was thinking that it's a lot of work for an "economy" head, but a good experiment regardless. Like the early 4A-FE head you worked on for your CAT sedan. (I still hope you decide to put a smallish turbo on that, as it's perfectly built & prepped for one.)
naked8689 wrote:LOVE the work MR.TOY you think it would be possible to use bag 16v springs with these heads? I know the 16v valves can be used with a little machine shop work. I'm currently doing something similar with my F head.
oldeskewltoy wrote:naked8689 wrote:LOVE the work MR.TOY you think it would be possible to use bag 16v springs with these heads? I know the 16v valves can be used with a little machine shop work. I'm currently doing something similar with my F head.
problem here is spring bind. As was discussed in http://club4ag.com/forums/viewtopic.php?f=13&t=15683 4AGE spring bind comes in at about 1.017", where as these springs bind @ .812". To use a 16V G spring in a 2nd gen F head, the F head would need to have the spring seats machined .200". Not saying it can't be done.... just not my first choice.
Gino1X1 wrote:oldeskewltoy wrote:naked8689 wrote:LOVE the work MR.TOY you think it would be possible to use bag 16v springs with these heads? I know the 16v valves can be used with a little machine shop work. I'm currently doing something similar with my F head.
problem here is spring bind. As was discussed in http://club4ag.com/forums/viewtopic.php?f=13&t=15683 4AGE spring bind comes in at about 1.017", where as these springs bind @ .812". To use a 16V G spring in a 2nd gen F head, the F head would need to have the spring seats machined .200". Not saying it can't be done.... just not my first choice.
As for as using springs..... Once upon a time I've mated 2/3T OEM valve springs to a 3K-B, let some older refinery mechanic machine my KP30's 4K head's valve seats to fit "rally type" valve springs made for a BMW 316. Topi at TRS USA helped a LOT here. I've even mated OEM 3SG valve springs on mY bluetop 4AGE before I've ordered my current TRDUSA valve springs...
My point? Depends on which cam(s) you're going to use, take your time and measure/measure/measure things out. No worries by then.
oldeskewltoy wrote: their delay is why there have not been many new posts recently
Rogue-AE95 wrote:oldeskewltoy wrote: their delay is why there have not been many new posts recently
I've been wondering how the "F" this head has been coming along
Rogue-AE95 wrote:9A-FE?? The fact that the rods are MRP makes me think of their stroker kits.
Forged GE pistons, or custom FE ones?
Never knew the Euro cam was different. There was also a nicer FE exhaust manifold, UK or Euro. If I recall correctly you got one for your built-up 4A-FE.
Rogue-AE95 wrote:
I'm guessing there will be a custom intake manifold for this? Or is the customer going to run with the stock one?
Valve Springs wrote:I really wish all my clients were as diligent as this one - My client is one who has done his research.....
He found a near perfect fit- http://www.catcams.com/products/valvesp ... CT_id=6851
matt dunn wrote:The MRP rods are also slightly longer than the standard 7A rod aren't they?
about 0.5mm from memory.
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