Wheel and tyre size for XB falcon sedan

[Stumps 384]

Lol, seen that ute in the flesh a couple of times....got the hairs tingling on the back of my neck just thinking of the sound.

 

Not looking to go that crazy and if 3.3 rods are a waste of time well that makes life easier then.

 

The other option was to rebuild the head that's under the bonnet and fit that to my already rebuilt bottom end.

 

I can get the single barrel flange removed and fit up a two barrel adapter properly and fit the BBD style holley sniper EFi. I could run the factory aircleaner and accessories and make it look stock under the bonnet.

 

It might make 200hp with that head or maybe more.

 

A worked crossflow would still be the better option I think.

 

Way too many ideas floating around in my head lol

[deankxf 21,470]

2 hours ago, Stumps said:

Lol, seen that ute in the flesh a couple of times....got the hairs tingling on the back of my neck just thinking of the sound.

 

Not looking to go that crazy and if 3.3 rods are a waste of time well that makes life easier then.

 

The other option was to rebuild the head that's under the bonnet and fit that to my already rebuilt bottom end.

 

I can get the single barrel flange removed and fit up a two barrel adapter properly and fit the BBD style holley sniper EFi. I could run the factory aircleaner and accessories and make it look stock under the bonnet.

 

It might make 200hp with that head or maybe more.

 

A worked crossflow would still be the better option I think.

 

Way too many ideas floating around in my head lol

 

 

@Thom machined an XB style head for a weber 34ADM (XE XF carb) once, 
My Dad told me probably 30yrs ago they used to machine that whole intake off and bolt on a flange and make their own intake manifolds. (porting the intake in the process)
back in the days before CNC machining etc even.. 

 

the holley sniper is pretty versatile, i saw one on a gemini 1600 once and it was running fine (was planning to blow through turbo it, but it was NA and running well also) 

the appeal was to make it hide under a stock air cleaner and make the turbo pipes appear factory. (no idea if it went that way, but would be cool on an XB engine also)

 

 

interesting reading this post i googled, someone saying they fitted side draught SU carbys to those heads, and ported while they were in there.
https://www.facebook.com/groups/2139811062888951/posts/2541421079394612/

[Thom 6,716]

I've done a couple of 1v to 2v conversions, this one was for a 2bbl holley, but personally I think they work better with a xflow webber, as far as your running on issues you problem may be you curb idle is set too high because you don't have enough initial timing, see if you can get a base timing of 8-12 degrees (wherever it is happiest) with the vac advance blocked off and try to get the throttle adjusted to as far closed as possible while maintaining a steady idle, if you can get it to idle cleanly and not run on when you shut the car off your idle circuit or an air bleed may be blocked

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[Stumps 384]

18 hours ago, Thom said:

I've done a couple of 1v to 2v conversions, this one was for a 2bbl holley, but personally I think they work better with a xflow webber, as far as your running on issues you problem may be you curb idle is set too high because you don't have enough initial timing, see if you can get a base timing of 8-12 degrees (wherever it is happiest) with the vac advance blocked off and try to get the throttle adjusted to as far closed as possible while maintaining a steady idle, if you can get it to idle cleanly and not run on when you shut the car off your idle circuit or an air bleed may be blocked

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Thom, how did you find the performance of the modified log head compared to a crossflow head?

[Thom 6,716]

Thom, how did you find the performance of the modified log head compared to a crossflow head?

Crossflows are a better engine overall, but this does wake the pre Crossflows up significantly, especially with a set of extractors and a cam, in saying that I've had some real turd Crossflows that didn't go as well as a stock 250 pre xflow, if you have a good running non smoking or oil burning pre xflow already in a car i would go with the modified log head, if you have a known good Crossflow I would go that route, if purely chasing power a Crossflow is a better engine, the biggest advantage the pre Crossflows have is sound, the shared centre exhaust port makes them sound better than the later 6 cylinders (especially if you run a set of split extractors and a twin exhaust the earlier 6 cylinders sound all the world like a windsor at low to mid rpm) modifying the 1v head to take a 2barrel really wakes them up, especially if you get the distributor re curved, the make more power everywhere and would be comparable to a midly tired xflow that still had some life left but had lost a bit of enthusiasm

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[Stumps 384]

I have a rebuilt 30 thou over bottom end with a 214 cam sitting on a stand and the car has only 77000 kays on its pre crossflow and it runs pretty good and sounds tits with the current extractors and dual 2 inch system which is split at the extractors.

 

Just dont know which way to go...so many options

 

It's a shame iron headed crossflow weigh as much as a clevo...i have plenty if bits for those in the back shed, including cain 4bbl manifolds and extractors....had a few of those things in XC and they are bulletproof but so damned heavy.