Xa gt-ho - Page 4

xm289 · 06-02-2014, 09:31 PM

I saw the 3rd race xa gtho(paul carthew's) driving down the hume hwy while driving back to Sydney from Phillip Island on Tuesday, must have been going down for the VIC all ford day sunday week.

Beautiful car

zoesgift · 06-02-2014, 09:59 PM

yes it is I had the pleasure of having a close look at it at the Bathurst gt nationals last year

xm289 · 06-02-2014, 10:09 PM

funny thing I was reading this thread earlier that morning then saw the racecar!!

castellan · 07-02-2014, 11:13 AM

Quote:

Originally Posted by HO 3

Your camshaft info is rubbish..........both the HO2 and HO3 ran the same DIZX-AA 494 th lift camshaft.........the HO3 also had an optional larger 524 th lift camshaft option........logic would assume the same DIZX-AA camshaft would of been originally used in the HO4 also.

Cheers Mick

Not so at all.

The P3 was more driver friendly than the P2 a dude i know confirmed this as he had a P2 from new.

The P4 was also milder as to page 48 in the dealer confidential bulletin and also this had a 3.0 diff to prove it and Bill Santuccione says so in the book.

XY GT-HO options on the motor never heard of that for joh blow, maybe for them in the know who got the motor blue printed for extra $250 did this.

zoesgift · 07-02-2014, 11:36 AM

phase 2s are not anywhere near as happy in traffic or from a set of lights compared to ph3s in STANDARD UNRESTORED form that is common knowledge. unrestored rpo83s drive similar to a phase 3 ....I have not had the pleasure of driving an unrestored phase 4 but with improvements over the model ranges and you tube videos of pc's unrestored xagt ho it sounds as though it drives similar if not better than a new phase 3.

HO 3 · 07-02-2014, 11:50 AM

Quote:

Originally Posted by castellan

Not so at all.

The P3 was more driver friendly than the P2 a dude i know confirmed this as he had a P2 from new.

The P4 was also milder as to page 48 in the dealer confidential bulletin and also this had a 3.0 diff to prove it and Bill Santuccione says so in the book.

XY GT-HO options on the motor never heard of that for joh blow, maybe for them in the know who got the motor blue printed for extra $250 did this.

More rubbish...........you might want to consult the Ford oem HO2 and HO3 supplements to get a handle on the cam spec instead of getting technical advise from your mate

.........as for the HO4 why do I have DIZX AA written down in my notes from a few years ago when I was consulted on some details about the green road car.

Cheers Mick

HO 3 · 07-02-2014, 12:08 PM

Quote:

Originally Posted by zoesgift

phase 2s are not anywhere near as happy in traffic or from a set of lights compared to ph3s in STANDARD UNRESTORED form that is common knowledge. unrestored rpo83s drive similar to a phase 3 ....I have not had the pleasure of driving an unrestored phase 4 but with improvements over the model ranges and you tube videos of pc's unrestored xagt ho it sounds as though it drives similar if not better than a new phase 3.

Probably the 2 biggest differences between the HO2 and HO3 can be attributed to the better drivability of the wide ratio box/3.25 vs close ratio box/3.5 and also the carburetor modification to the Ford holleys used in the HO3s.

Cheers Mick

Stefan · 07-02-2014, 12:51 PM

If the P2 was a dog to drive with a C/R Toploader and 3.5 diff gears.

Imagine the Phase 4 with the a purported C/R toploader and 3.0s.

I'm still not convinced that was the intended spec for a P4 road car as it would be near impossible to drive and burn out clutched everty few months.

When younger and we knew no better we threw a C/R toppie in my brother's 351 XB which had 3.0s and it was simply not possible to drive it.

HO 3 · 07-02-2014, 01:08 PM

Quote:

Originally Posted by Stefan

If the P2 was a dog to drive with a C/R Toploader and 3.5 diff gears.

Imagine the Phase 4 with the a purported C/R toploader and 3.0s.

I'm still not convinced that was the intended spec for a P4 road car as it would be near impossible to drive and burn out clutched everty few months.

When younger and we knew no better we threw a C/R toppie in my brother's 351 XB which had 3.0s and it was simply not possible to drive it.

Didn't Fords HO4 memos state the spec was going to be a wide ratio box with a 3.0 final ratio for the road cars.

Cheers Mick

castellan · 07-02-2014, 01:10 PM

Quote:

Originally Posted by HO 3

More rubbish...........you might want to consult the Ford oem HO2 and HO3 supplements to get a handle on the cam spec instead of getting technical advise from your mate

.........as for the HO4 why do I have DIZX AA written down in my notes from a few years ago when I was consulted on some details about the green road car.

Cheers Mick

I do have the spec for both P2 and P3 but not for P4.

HO 3 · 07-02-2014, 07:15 PM

Quote:

Originally Posted by castellan

I do have the spec for both P2 and P3 but not for P4.

Having trouble with our google searches or quality magazine reference material are we?

Cheers Mick

290GTP · 07-02-2014, 07:34 PM

Quote:

Originally Posted by HO 3

Didn't Fords HO4 memos state the spec was going to be a wide ratio box with a 3.0 final ratio for the road cars.

Cheers Mick

Yes they did. Close ratio box was never destined for the phase 4. Phase 2 needed the **** revved out of it to get it moving due Cr toploader & tall diff gears, phase 4 was supposed to be a lot more tractable & user friendly.

zoesgift · 07-02-2014, 08:54 PM

yeah but once it gets going stagger me! you can point the things where you want them to go and fire as long as its a straight line of course

castellan · 08-02-2014, 10:15 AM

Quote:

Originally Posted by HO 3

Having trouble with our google searches or quality magazine reference material are we?

Cheers Mick

No i have it written down somewhere years ago, if i bother to look for it.

Like i have said the dude who knows the P4 cam spec. and some clown hear thinks that this dude would not know.

The P2 is the higher lift cam.

Only an idiot would think that P3 would come in two different cams unless it's a blue print special one, that you were informed of an option in that.

I am referring to this latest mag mainly as a topic.

I don't know why people come out crying if one ask questions and then pushes that XY GT-HO came out with 2 different cams and does not have any proof wort jack to back it all up.

pottery beige · 08-02-2014, 01:01 PM

You make my head hurt

Congrats!

jakkes · 08-02-2014, 03:27 PM

Quote:

Originally Posted by HO 3

Probably the 2 biggest differences between the HO2 and HO3 can be attributed to the better drivability of the wide ratio box/3.25 vs close ratio box/3.5 and also the carburetor modification to the Ford holleys used in the HO3s.

Cheers Mick

would i be correct in saying the those two holleys (1969 302 boss and 70 carbs) had different metering blocks??? hence why the p2 was considered more grumpy then the p3??

castellan · 08-02-2014, 04:40 PM

Quote:

Originally Posted by jakkes

would i be correct in saying the those two holleys (1969 302 boss and 70 carbs) had different metering blocks??? hence why the p2 was considered more grumpy then the p3??

I don't think so at all.
It's been my experance that the dizzy timing can make it a bit more or less lumpy then the carby if anything was to do with what we are on about.

jakkes · 08-02-2014, 06:12 PM

from my understanding the idle circuit on the 1970 boss 302 780 Holley was recalibrated
same carb used on the P3….. P2 used a 1969 boss 302 780 Holley

out of interest have you tuned both a P2 & P3

HO 3 · 08-02-2014, 06:24 PM

Quote:

Originally Posted by jakkes

would i be correct in saying the those two holleys (1969 302 boss and 70 carbs) had different metering blocks??? hence why the p2 was considered more grumpy then the p3??

Yes they are..........the boosters might be different also from memory but don't quote me on that, maybe a carby expert can chime in?

Cheers Mick

HO 3 · 08-02-2014, 06:39 PM

Quote:

Originally Posted by jakkes

from my understanding the idle circuit on the 1970 boss 302 780 Holley was recalibrated
same carb used on the P3….. P2 used a 1969 boss 302 780 Holley

out of interest have you tuned both a P2 & P3

Yeah correct, Ford did publish a bulletin back in the day about the mod.......updating 69 primary metering block idle well to 70 spec giving better idle/transition response. Perhaps our resident troll can provide it?

Cheers Mick

HO 3 · 08-02-2014, 08:55 PM

Quote:

Originally Posted by castellan

No i have it written down somewhere years ago, if i bother to look for it.

Like i have said the dude who knows the P4 cam spec. and some clown hear thinks that this dude would not know.

The P2 is the higher lift cam.

Only an idiot would think that P3 would come in two different cams unless it's a blue print special one, that you were informed of an option in that.

I am referring to this latest mag mainly as a topic.

I don't know why people come out crying if one ask questions and then pushes that XY GT-HO came out with 2 different cams and does not have any proof wort jack to back it all up.

Ok I have just got off the phone with Ford Au..........can you please supply the correct higher lift P2 cam specs to the one they published 44 years ago in their Phase 2 Supplement so we can finally address this tragic mistake.

Mick

pottery beige · 08-02-2014, 09:13 PM

first thing you do with any old GT is throw the ******* cam over the nearest fence

slap something decent in it

HO 3 · 08-02-2014, 09:43 PM

Quote:

Originally Posted by pottery beige

first thing you do with any old GT is throw the ******* cam over the nearest fence

slap something decent in it

Yep I'm hearing you..........some say that if there is an unfortunate individual standing on the other side of the fence and they are struck in the head by the way wood camshaft head injury is possible......perhaps this is the case

Cheers Mick

290GTP · 09-02-2014, 07:09 AM

I keep my old GT cam beside my bed, to persuade would be intruders.

pottery beige · 09-02-2014, 10:55 AM

PBs original cam snapped, its out in the shed somewhere, too short for a bash bat

castellan · 09-02-2014, 11:35 AM

Quote:

Originally Posted by HO 3

Ok I have just got off the phone with Ford Au..........can you please supply the correct higher lift P2 cam specs to the one they published 44 years ago in their Phase 2 Supplement so we can finally address this tragic mistake.

Mick

I will have to have a look see but it's the higher lift cam for the P2.
P2 had a 750 Holley P3 had a 780 i thought.

Bossxr8 · 09-02-2014, 02:54 PM

I remember reading that the PH4 motors were all supposed to have the QC treatment as standard, and not an option like on PH3. Not sure how true though.

Blue Roo · 09-02-2014, 03:42 PM

Quote:

Originally Posted by Bossxr8

I remember reading that the PH4 motors were all supposed to have the QC treatment as standard, and not an option like on PH3. Not sure how true though.

True!

HP-0351 · 10-02-2014, 05:23 PM

Quote:

Originally Posted by Stefan

If the P2 was a dog to drive with a C/R Toploader and 3.5 diff gears.

Imagine the Phase 4 with the a purported C/R toploader and 3.0s.

I'm still not convinced that was the intended spec for a P4 road car as it would be near impossible to drive and burn out clutched everty few months.

When younger and we knew no better we threw a C/R toppie in my brother's 351 XB which had 3.0s and it was simply not possible to drive it.

I have had no problem driving the Calypso Green Phase IV with the 3.0 gears and close ratio toploader. Once you learn to give it enough rpm when taking off your home and hosed

jakkes · 10-02-2014, 06:23 PM

Quote:

Originally Posted by castellan

I will have to have a look see but it's the higher lift cam for the P2.
P2 had a 750 Holley P3 had a 780 i thought.

nope as i stated 1970 p2 cleveland engine used the 1969 boss 302 780 cfm Holley

p3 1970 boss 302 780 cfm holley