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AU V8 bonnet clearance 

 

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 Post subject: AU V8 bonnet clearance
Posted: Thu Jan 15, 2015 1:17 pm 
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Does anyone know how much space there is between the top of the Windsor 5.0L Explorer intake manifold and the bonnet?

 

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 Post subject: Re: AU V8 bonnet clearance
Posted: Thu Jan 15, 2015 1:44 pm 
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if its a low series or xr bonnet its about 15mm.... I have a 10mm phenolic spacer on the explorer manifold and the tps screw has rubbed through the liner but just misses the bonnet..

was that the pm u sent me??
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 Post subject: Re: AU V8 bonnet clearance
Posted: Thu Jan 15, 2015 2:09 pm 
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Thanks Troy. Yes, I was going to send you a PM but thought the answer might be useful for others on here.

The Performance Products Typhoon manifold, I've got, is about 10mm higher than the Explorer and I was planning to put a phenolic spacer under it. Looks like that's not going to work.

 

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 Post subject: Re: AU V8 bonnet clearance
Posted: Thu Jan 15, 2015 3:09 pm 
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 Post subject: Re: AU V8 bonnet clearance
Posted: Thu Jan 15, 2015 3:38 pm 
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Just stick a reverse cowl on and be done with it :D

Another option would be to mill down the upper/lower intake to get the required height. Just make sure that there is enough thread engagement for the upper to lower bolts and that the upper clears your fuel rails and/or rocker covers.
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 Post subject: Re: AU V8 bonnet clearance
Posted: Thu Jan 15, 2015 7:12 pm 
Getting Side Ways
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I might see what the cost is for machining the upper and lower manifolds. The missus is a bit :x at the $3k I spent on the partial engine rebuild so far :D... I'll keep the steel bonnet bulge option open though.

 

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 Post subject: Re: AU V8 bonnet clearance
Posted: Sat Jan 17, 2015 8:25 pm 
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Of course there is no advantage of the Typhoon intake over the Explorer one.
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 Post subject: Re: AU V8 bonnet clearance
Posted: Sat Jan 17, 2015 11:10 pm 
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XR9UTE wrote:
Of course there is no advantage of the Typhoon intake over the Explorer one.

I couldn't find much info on Australian forums about the Typhoon. In the US forums, some guys say the same thing and others say they picked up some power over 3000 rpm.

So would it be better to just do some porting or port matching on the Explorer lower? I read somewhere that the Explorer runners for #1, #5 and #8 need to be straightened up.

 

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 Post subject: Re: AU V8 bonnet clearance
Posted: Sat Jan 17, 2015 11:32 pm 
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I did some port matching on a explorer lower to match the trickflow heads and to be honest I think I went backward, while it seemed to pick up a touch of go over 5500rpm it felt like it lost a lot under 3500rpm, after some forum surfing and reading I think I might have caused a low pressure or a open area where it lost air velocity..

so as of tonight actually, I have re fitted the std un molested explorer lower..
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 Post subject: Re: AU V8 bonnet clearance
Posted: Sun Jan 18, 2015 10:40 am 
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The lower responds really well to porting but easy to go backwards. Tom Moss has a porting guide for the Explorer on eectuning.org. He's a pro with them.
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 Post subject: Re: AU V8 bonnet clearance
Posted: Sun Jan 18, 2015 12:05 pm 
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Shortshift wrote:
XR9UTE wrote:
Of course there is no advantage of the Typhoon intake over the Explorer one.

I couldn't find much info on Australian forums about the Typhoon. In the US forums, some guys say the same thing and others say they picked up some power over 3000 rpm.

So would it be better to just do some porting or port matching on the Explorer lower? I read somewhere that the Explorer runners for #1, #5 and #8 need to be straightened up.

The typhoon is a Chinese copy of the old Edelbrock Performer Rpm (not the RPM 2).
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 Post subject: Re: AU V8 bonnet clearance
Posted: Tue Jan 20, 2015 9:26 pm 
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I was undecided about the Typhoon to start with so I'm going with the Explorer manifold, and getting the lower port matched by the machine shop. Should look nice with a new coat of paint.

TROYMAN wrote:
I have a 10mm phenolic spacer on the explorer manifold
Have you noticed any difference in the engine performance with the spacer?

 

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 Post subject: Re: AU V8 bonnet clearance
Posted: Tue Jan 20, 2015 9:36 pm 
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Shortshift wrote:
I was undecided about the Typhoon to start with so I'm going with the Explorer manifold, and getting the lower port matched by the machine shop. Should look nice with a new coat of paint.

TROYMAN wrote:
I have a 10mm phenolic spacer on the explorer manifold
Have you noticed any difference in the engine performance with the spacer?


hard to say as I fitted the spacer when I fitted the tfs heads, I had to use aftermarket rocker covers to clear the tfs rockers, then I had to fit the spacer so the explorer manifold cleared the rocker covers.. :roll:
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