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EL2 XR8 head upgrade 

 

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 Post subject: Re: EL2 XR8 head upgrade
Posted: Tue Sep 16, 2014 12:25 am 
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and of course the pacemakers won't clear the spark plugs on those heads.
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Tue Sep 16, 2014 7:04 am 
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Which pacemakers do I go for??
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Tue Sep 16, 2014 9:55 am 
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For the money you expect to pay for those GT40P heads you are better off saving a few hundred more and getting a much better head such as a trick flow twisted wedge. 40p's are only good value if you can score them for around 400-500 bucks.

Last edited by xcabbi on Wed Sep 17, 2014 10:06 pm, edited 1 time in total.

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 Post subject: Re: EL2 XR8 head upgrade
Posted: Tue Sep 16, 2014 11:56 am 
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Ef Nut wrote:
Which pacemakers do I go for??


None of them fit 40P's. Better idea is to get aftermarket heads.
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Wed Sep 17, 2014 9:11 pm 
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Hey 'XR9utE'

You have changed my mind completely again, so I'm going alloy,
I'm going to recondition the bottom end and get some (AFR 165 Renegade heads).
Are these ok;
http://m.ebay.com/itm/400746724836?nav=SEARCH

WHAT:
cam??
valve springs??
roller rockers??
Extractors?

Would you suggest Or any other bits do I need to complete this conversion,
Would love to get around 300hp. (Am I dreaming? As it is auto)

Thanks :)
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Thu Sep 18, 2014 3:03 pm 
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I prefer the AFR 1399 part number simply because it doesn't have the EGR ports or heat pump holes at the end of each head. The valvetrain components which come on those heads are fine you will not need to replace them. You will however need stud mount rockers, hardened pushrods & taller valve covers to clear the roller rockers.

For an easy 'bolt on' upgrade I would use the following:

AFR 1399 heads
Comp Cams 19049-16 rocker arms
Comp Cams XE270HR-14 cam (35-351-8)
Rollmaster CS3040 timing chain set
Trend 6.300" pushrods
Felpro 1250 intake gaskets
Felpro 1415 exhaust gaskets
Pacemaker PH4000 headers
Ported Explorer intake 70mm Tickford TB

If you are chasing a power figure & a bit more top end power I'd change a few components:

Trickflow 11R 190cc heads milled to 50cc
Lunati Voodoo camshaft 61011
Trickflow R-series intake
7.100" pushrods

The 2nd option on cam, heads, and intake will require a high stall converter and 3.9 diff gears.

 

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TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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 Post subject: Re: EL2 XR8 head upgrade
Posted: Sat Sep 20, 2014 11:11 am 
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Thanks heaps 'BOTTLEDUP'
I'm going with the first opinion you sugested.

In your opinion, after I get it tuned how many kW/ hp will this setup make?

My stock engine just ticked over to 255,000kms, the
bottom end is going to get reconditioned

I can't thank you enough for point me in the right direction.. :)
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Sat Sep 20, 2014 11:56 am 
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Also I for got to ask, will I need a different MAF To suit the 70mm tickford t/b? If so what size maf?
And how bout injectors do I need to change from #19 to #24??

Thanks sorry bout all the questions
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Sun Sep 21, 2014 4:42 pm 
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You'll need at least a 70mm MAF but an 80mm is more like it. Plus 24's.
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Sun Sep 21, 2014 5:42 pm 
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AU 73mm MAF & 24lb injectors would be a definite, but you could find yourself close to the upper limits of these components as well... In which case it might be simpler to go straight to a Lightning MAF & 30lb injectors.

You'll also need to look at an upgraded fuel pump, the Walbro 255L or 400L units would be a good idea.

As for a power figure it will depend on the dyno, but a figure in the 280-300rwhp is possible. If it was me and the bottom end is getting rebuilt with new pistons, I would get a set of these:
http://www.summitracing.com/int/parts/t ... /overview/
And run the Trickflow 11R 190cc head:
http://www.summitracing.com/int/parts/t ... /overview/

Keep everything else as per the first parts list except pushrods (these heads need the longer ones) and you'll have a very punchy little 5.0L

 

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TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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 Post subject: Re: EL2 XR8 head upgrade
Posted: Sun Sep 21, 2014 10:30 pm 
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Yeah sweet sounds very good, which push rods/ size would you suggest??
I'm suprised on the price difference between the AFR and Trickflow heads :)

Just finalizing the list and calculating prices,
so far I reakon it will cost a bit over $4000.00 (for parts)

Can anyone suggest a rough price on how much it should cost for tune and install of this?
I'm not very smart when it comes to that sort of stuff and last thing I want is to be taken advantage of and pay big $$$ for no reason.

The feed back I've been recieving has been fantastic on the forums
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Tue Sep 23, 2014 3:54 pm 
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Can't really coment on the labour costs as I do all this sort of thing myself, but I'd guess around the $1500 mark? Drive in drive out, maybe more depending on the tuning hardware required.

 

_________________

TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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 Post subject: Re: EL2 XR8 head upgrade
Posted: Mon Sep 29, 2014 6:45 pm 
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Last question and I'll be on my way collecting parts, I'm looking to recondition my auto gear box, what high stall would you suggest for the set up listed??

Thanks :)
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 Post subject: Re: EL2 XR8 head upgrade
Posted: Tue Sep 30, 2014 10:38 am 
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2500+, ideally I'd run around a 3000 stall while keeping the lockup clutch. Getting your auto reconditioned and then perhaps adding one of the shiftkits.com shiftkits would tighten up the shifts nicely.

 

_________________

TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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