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Author Topic: 12v or 24v  (Read 3152 times)

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86coz

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12v or 24v
« on: September 01, 2008, 19:40:29 PM »
hi all  
just wondering...im doing a 100e with a 29 12v but really fancy a 24v...my question is this!
is there a big difference between them at 175bhp and 200bhp ...is there much wieght wise as i think there both cast blocks and if i did go 24v is it the early granny lump or the later that is better



granada steve

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12v or 24v
« Reply #1 on: September 01, 2008, 20:25:15 PM »
Quote from: 86coz
hi all  
just wondering...im doing a 100e with a 29 12v but really fancy a 24v...my question is this!
is there a big difference between them at 175bhp and 200bhp ...is there much wieght wise as i think there both cast blocks and if i did go 24v is it the early granny lump or the later that is better
the boa engine is the earlier cosworth engine and is normally thought of as the more reliable and is the normal choice above the later bob engine it also lighter than the 2.9 12v but most people think that the 12v is bulletproof and is more reliable. however as with all engines how it has been maintained is most important.also remember all three options mate up normally to a autobox .the capri guys on the site will have a good knowledge of the boa engine mated to a manual box.the power difference is 12v around 150bhp,boa around 196bhp and bob around 208bhp.like i said the capri guys are very knowledgable. my choice would be the boa with a manual box good luck with whatever you choose

Offline TwinTurbo

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12v or 24v
« Reply #2 on: September 01, 2008, 21:01:36 PM »
BOA is not lighter than a 12V it's actually a lot heavier and bigger at the top. But 196 is the book figure for the granny with the cats and viscous fan so with them removed an IDEAL engine would see about 205BHP

The 12V  IS more reliable and much easier to fix as the chain drive is short and parts are not a problem, unlike the 24V's with their long chains, tensioner, blades, guides. etc...

Personally, in a 100E... 150BHP is probably going to be quite good fun, and it's not going to break a  normal Type 9 Box.  So the 12V seems like a reasonably sound Idea.

TT

HeraldandCapri

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12v or 24v
« Reply #3 on: September 01, 2008, 22:12:17 PM »
I'd probably second that! The 24v doesnt 'alf get pricey if you want to rebuild it. Parts take a bit of tracking down too. (speaking from experience  ) Most motorfactors have 12V stuff though. And like TT said, 150bhp as standard, in a 100E will be plenty. The torque could be quite entertaining!

samol

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12v or 24v
« Reply #4 on: September 01, 2008, 23:01:04 PM »
Just as a point of interest, my 12V, which was fully re-conned made 142 BHP on the rolling road. Later I fitted a Kent Fast Road cam, dumped the airflow meters, and changed to Megasquirt, it then made 174 BHP on the R/R. So not to sure where you blokes get your fancy BHP figures from, for a standard engine?
I now have a BOA fitted, again running MS and that just scrapes 217 BHP, and it's fitted with BOB cams, vernier pullies, tubular manifolds et al. Both engines, by the way ran/run on manual box's. Cheers Ray

tonto

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12v or 24v
« Reply #5 on: September 02, 2008, 07:32:36 AM »
I had a 2.8 stroked to 3005. made 165bhp from memory. got 260 now tt 2.8 engine

Offline Dave

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12v or 24v
« Reply #6 on: September 02, 2008, 09:24:09 AM »
Hell yeah there is a big difference.

Just take a ride in a Granny Cossie then step into the 12V version.

Question would be answered about 2 miles down the road  


Fair enough a 12V will last along time without any major work but the 24V only needs some simple checks to ensure it also lasts ages.

Anyway what fool would plough 2K + into building a car only to fit a old engine into it that has not been at the very least checked over
« Last Edit: September 02, 2008, 09:25:05 AM by Dave »
Dave

granada steve

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12v or 24v
« Reply #7 on: September 02, 2008, 22:02:24 PM »
Quote from: Dave
Hell yeah there is a big difference.

Just take a ride in a Granny Cossie then step into the 12V version.

Question would be answered about 2 miles down the road  
Fair enough a 12V will last along time without any major work but the 24V only needs some simple checks to ensure it also lasts ages.

Anyway what fool would plough 2K + into building a car only to fit a old engine into it that has not been at the very least checked over
gotta agree with dave 12v or 24v i have one of each and its the 24 every time

86coz

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12v or 24v
« Reply #8 on: September 03, 2008, 20:51:51 PM »
i know the 24 v will be more what i want really just trying to convince myself the 12v is good cos its there and cheap  
 thats what i thought...being used to 3dr cozs and skylines dont want to be to    when its done but having said that i got the 12v very cheap
but i do like the look of the granny cos v6 under the lid in pics iv`e seen
might just use the 12v to start as its in now and find and build a 24v later  
or if any bods has a granny they dont want i could poss rehome it  
jesus by the time its taken me  to decide i could had it built

Offline RRX

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12v or 24v
« Reply #9 on: September 03, 2008, 23:51:56 PM »
I would be more worried about having the heads hitting the inner arches on a 100e. i have a friend dropping a zetec in one and have seen a 2.9i in a very nice cream one and that was a squeeze
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86coz

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12v or 24v
« Reply #10 on: September 04, 2008, 22:11:44 PM »
[I would be more worried about having the heads hitting the inner arches on a 100e. i have a friend dropping a zetec in one and have seen a 2.9i in a very nice cream one and that was a squeeze]

i av`e a 2.8 in there now and seems to be loots of room...but the  engine bay could be a bit of an illusion

i think i will try the 2.9 oot the 4x4 in with a know good  tranny derv box as im unsure aboot the type 9 in there now...ohh i also av`e a set of twin 40s from a nove sport has any body got info on fitting em to  v6...who does rejetting ect

JohnLawley

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12v or 24v
« Reply #11 on: September 05, 2008, 02:09:37 AM »
32v  lexus V8's are cheap as chips as they don't break so noone needs them :-) just though i'd throw that in there 280bhp out the box.

popuptoaster

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12v or 24v
« Reply #12 on: September 05, 2008, 10:07:11 AM »
I dont see why a well looked after and checked over 24v is any worse than a 12v and its a damn sight faster and more economical, ive had 12v Sierra's that broke down all the time at least as often as ones that never let me down.

JohnLawley

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12v or 24v
« Reply #13 on: September 11, 2008, 01:41:56 AM »
my 12v drank fuel like a fish and wasn't very fast (0-60 9.1 secs my best ever).

 

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