Aluminum Rod?

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68Z
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Aluminum Rod?

#1 Post by 68Z » Wed Oct 17, 2012 8:55 am

I have a 540 BBC with Twin 91's turbo's making 2500hp at 35lbs of boost @ 8500 RPM's.
My question is what can I expect for rod life with aluminum rods? how many passes!
It is a small tire stock suspension drag radial car weighing in at 3600lbs.
Thanks
Trev
68 Camaro Z/28
302 4spd
12.31@114mph

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Mike Peters
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Re: Aluminum Rod?

#2 Post by Mike Peters » Thu Oct 18, 2012 9:05 am

68Z wrote:I have a 540 BBC with Twin 91's turbo's making 2500hp at 35lbs of boost @ 8500 RPM's.
My question is what can I expect for rod life with aluminum rods? how many passes!
It is a small tire stock suspension drag radial car weighing in at 3600lbs.
Thanks
Trev
What brand of rod? I would think your best answer is to ask the rod manufacturer. I doubt they'll give you a guarantee but, they can give you an idea.
"If winning was easy, losers would be doing it"

68Z
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Re: Aluminum Rod?

#3 Post by 68Z » Thu Oct 18, 2012 11:18 am

They are GRP rods!
I will contact them thanks!
68 Camaro Z/28
302 4spd
12.31@114mph

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Mike Peters
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Re: Aluminum Rod?

#4 Post by Mike Peters » Thu Oct 18, 2012 11:30 am

68Z wrote:They are GRP rods!
I will contact them thanks!
Very good rods no doubt. Sounds like quite the combination you have. Have you made any passes? Photos of cars are always appreciated...... especially 2500 HP beasts!!!!
"If winning was easy, losers would be doing it"

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John_Heard
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Re: Aluminum Rod?

#5 Post by John_Heard » Thu Oct 18, 2012 12:12 pm

The higher the horsepower, the fewer cycles they will want you to run the rods. Like Mike said ask GRP, but I'm betting they will tell you 80 passes or less.

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Mike Peters
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Re: Aluminum Rod?

#6 Post by Mike Peters » Thu Oct 18, 2012 1:04 pm

John_Heard wrote:The higher the horsepower, the fewer cycles they will want you to run the rods.
Mine should last practically forever then!!!! :lol:
"If winning was easy, losers would be doing it"

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supernova
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Re: Aluminum Rod?

#7 Post by supernova » Fri Oct 19, 2012 7:46 am

We run GRP aluminum rod in your TopSportsman N/A 704 ci motor. We make 200 full passes with them and out they come. We have 120 passes on them now and should be able to go through next season with them.

Under the stress your rods are under I wouldn't push them pass 75-100 full passes.

But like John and Mike, I would call GRP and ask.
Blackhoodmafia!!!! :mrgreen: :mrgreen:

1972 Nova SS
572 C.I. BBC

Best to date: 1/8
et: 5.28
mph: 134
new wt. 3340 lbs

68Z
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Re: Aluminum Rod?

#8 Post by 68Z » Sun Nov 04, 2012 8:36 am

Thank you all for your comments!
When It is time to change the rods Looks like at about 75-100 passes! if the leak down and compression test are all good can I re-use the rings. Or should I just de glaze the bores and install new rings anyway?
68 Camaro Z/28
302 4spd
12.31@114mph

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John_Heard
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Re: Aluminum Rod?

#9 Post by John_Heard » Sun Nov 04, 2012 9:21 am

If you've got it down probably should freshen the bore and rings while you're at it. They won't hold tension forever.

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wikd69
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Re: Aluminum Rod?

#10 Post by wikd69 » Sun Nov 04, 2012 5:15 pm

geez louise, whats a set of aluminum rods run ?

75 to 100 passes ? wow, thats a level of racing I absolutely can't affort !!!

Of course, I'm not (and never will be) running 2500 hp either :smt003
1969 ProStreet Camaro RS Best 9.75@139 1.46 60'
Blown 427 BBC, TH400 w/Brake, Back-Half Ladderbar
Narrowed 12-Bolt, 4.10 Gears, Spool, Moser 33 Spline

http://www.marsh-racing.com/harrys_camaro-1.htm

68Z
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Re: Aluminum Rod?

#11 Post by 68Z » Tue Nov 06, 2012 9:05 am

Mike Peters wrote:
68Z wrote:They are GRP rods!
I will contact them thanks!
Very good rods no doubt. Sounds like quite the combination you have. Have you made any passes? Photos of cars are always appreciated...... especially 2500 HP beasts!!!!
No passes yet still working out some bugs!
I am not sure how to post pictures on here!
Trev
68 Camaro Z/28
302 4spd
12.31@114mph

68Z
Posts: 34
Joined: Thu Dec 04, 2008 2:22 pm
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Re: Aluminum Rod?

#12 Post by 68Z » Tue Nov 06, 2012 9:28 am

Image
68 Camaro Z/28
302 4spd
12.31@114mph

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John_Heard
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Re: Aluminum Rod?

#13 Post by John_Heard » Tue Nov 06, 2012 9:33 am

Fixed it for ya, next time hit the IMG button ^^^^^ above your message window, then stick the image URL inbetween the image tags. Then it will show up in your post.

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Mike Peters
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Re: Aluminum Rod?

#14 Post by Mike Peters » Tue Nov 06, 2012 9:37 am

Holy Drag Radial Smoke Batman!!! That thing looks just plain evil!!!! :twisted: Anxious to hear future reports.
"If winning was easy, losers would be doing it"

68Z
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Re: Aluminum Rod?

#15 Post by 68Z » Tue Nov 06, 2012 12:57 pm

I will keep everyone up on how we are doing this coming year! ;)
Trev
Thanks John!
68 Camaro Z/28
302 4spd
12.31@114mph

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