8v Blocks - Increased Cc

[wardy18 33 1 Cars]

Mornin all,

 

Just lookin at my options for further years development on the Hillclimb pug

 

I have just emailed HiFlow Heads regarding a price on a 2100cc block fully build ready to go (i will already have a BV head from Puma Racin runnin 45's and a Catcam which will bolt ontop).

 

I have been told that these blocks are iron which i needed for the extra strength to support the wafer thin liners, but these blocks are about 18kg heavier (which im not bothered about when you weigh up against the extra torque).

 

I would like to compare the price they give for a block ready to go to me sourcing a similar block and building it myself with a different crank and the larger pistons/liners etc etc, but does anyone know what is needed, the guy i was speaking to yesterday said something about a 88mm crank to accomodate the extra throw.

 

Can anyone help with whats needed for this conversion and where to source the parts or what engines, ie XU10?!

 

Many Thanx

 

Simon

[James_R 3]

I'd give Miles at pug racing a ring.

 

The XU10 blocks are cast iron with no liners, you can go to 88mm bore on forged pistons and 88mm crank from a diesel or an Mi to give you circa 2.1L

 

Which class are you lookign to run in though?

[rescue dude 0]

Which class are you lookign to run in though?

 

 

I think anyone who competes in the upto 2 litre class are interested in which class he'll be running in.

 

If you run in the over 2 litre roadgoing or mod-prod you won't have a chance against the Impreza's and Evo's, so i'd stay below the 2 litre limit as it's not a worthwhile mod.

[VisaGTi16v 1]

You get plently of 2.4 litre Escorts in the 2 litre class. Highly tedious.....a Vauxhall engined one turned up on Saturday at Lydden! Pointed this out to the bda one that was going to win the class and magically the vauxhall one was shoved into Sports Libre 10 minutes later!

 

Depends what engine splits they run in the Islands. The south west its all 1.8+ so doesnt matter what size it comes out in the end.

Edited October 30, 2007 by VisaGTi16v

[wardy18 33 1 Cars]

yeh the class is 1801cc and over

 

BUT, ive just had a thought, to stay in the Mod Production class the head and block have to stay as original fitment, ie i cant drop in a GTi-6 engine.

 

Can you tell the difference between the XU9 and the XU10 blocks, ie is it just internally thats different?!

 

In the class at the moment is a M3 EVO E36 and a Scoob WRX, but they are twice as heavy as me my light weight pug and as its not a high speed hillclimb ill be in with a very good chance!!

[Anthony 1,000]

Can you tell the difference between the XU9 and the XU10 blocks, ie is it just internally thats different?!

XU9 is alloy block and XU10 is iron block for starters, so very easy to tell the difference

[wardy18 33 1 Cars]

ah well thats that idea out the ****** window then unless i move up a class to Special Saloons 1801cc And Over

 

was the MI16 block that can be fitted and pretty much undetected as it only has an extra bit of webbing, what size pistons can you go to in that block?!

 

is the 83.5mm (1928cc) the bigest size you can go to in a 205 8v block without risking blowin it up?!

[Anthony 1,000]

was the MI16 block that can be fitted and pretty much undetected as it only has an extra bit of webbing, what size pistons can you go to in that block?!

1.9 Mi16 block is largely the same as the XU5/XU9 block and the main difference is the oil spray bars. Uses the same sized liners (you can interchange Mi16 and 8v liners fine) and hence you've still got the same bore limitations as you have with your existing engine.

 

You can/could buy special oversized liners to allow 84mm or bigger, but I've no idea on availability, nor sizes or costs.

[wardy18 33 1 Cars]

cool ill look into it, the buy i spoke to yesterday said that the liners start becoming wafer thin and so arent really reliable, will have to get a definate answer on just how big u can safely go on an 8v?!?

 

thanx for your help

[Batfink 201]

Miles can do large bore liners. Block will need machining for them to fit I think. I'd be interested as to how strong and thick these are though as I have a project I think needs these

[wardy18 33 1 Cars]

sounds good to me, i have a spare block that i can do this to while im still racing aswel so happy days, i think from what ive been told that any bigger than 83.5mm pistons and the liners start becoming far too thin but i assume that with machinin the block will allow for bigger outter diameter liners and so be able to fit bigger pistons!!

 

ill get on the case and let u know

[Batfink 201]

thats my understanding

[wardy18 33 1 Cars]

DAMN IT

just finally bought a Digi Vernier Caliper and measured the engine i got hold off which had just rebuilt and supposedly was a 2ltr (which i didnt beleive to start with) but i did hope that it has at least 83.5

 

NOPE

 

its just got the standard 83mm, well atleast they are brand new i suppose

[Anulfo 22]

I had my engine rebuilt with the 83.5mm pistons which works out at 1,927/28cc thus keeping me under the 2litre limit. Although i live in the south west and a lot of my events i am placed in the 1,800cc-2,600cc class there a some events (Abingdon carnival) that i like to compete in where the 2litre limit still applies!!!!

[B1ack_Mi16 67]

If you want to stay in the under 2000cc class I think it's best just to get the 85mm liners and some matching pistons.

They will give 1997,5cc's.

 

Can't remember exactly who sell those liners but think it's some french company.

[wardy18 33 1 Cars]

thanx for the replies, unfortunately for me there are only 3 classes in the Modified Production, these are up to 1400cc, 1401cc to 1800cc and then the one im in 1801cc and over

 

so for me its unlimited and the most i can get is best

 

BUT, i am unable to change the XU9 block for say the XU10 allowing me to fit large liners, i have to stick with the XU9 block unless i wanna be bumped up in Special Saloons whcih is big money and cars

 

so having to stick to the XU9 block i am very limited when increasing bore size as the liners become wafer thin any larger than 83.5mm unless i go down the route of machining the block to accomodate larger liners that would fit in the XU10, this then is starts to become very harmful on the wallet unless i can get hold of one already done.

[Sandy 189]

There is an Iron block XU in the 205 range you can legally use, you just have think outside the box a bit

[28CRAIG 2]

There is an Iron block XU in the 205 range you can legally use, you just have think outside the box a bit

 

I was just of thinking that

[wardy18 33 1 Cars]

yeh the XU10 is an iron block but it is very different looking to the XU9 and so will be noticed so cant risk it

 

dont worry, i left the box weeks ago

 

the XU10 would be the perfect option as u can take it as high as a 2300cc and HiFlow heads supply fully built blocks ready to rock, just a shame they look different

[Batfink 201]

basically you dont have to keep a GTI block for a GTI. Any 205 block can be used. I'm going to guess that the diesels are good old iron xu engines. Personally I would look at trying to drop to 1800cc too though I dont know if this is possible.

[wardy18 33 1 Cars]

as long as it looks like the XU9 i can get away with it but MSA Blue Book Rules apply which state the original block must be retained

 

i could do with sourcing pictures of the different blocks avaiable and seing how similar they are ie the diesel block etc etc

[Anthony 1,000]

The XU7 (1.8 litre) engine is alloy blocked and very similar to XU5/XU9 ones, so that's a possibility if you want to drop into the under 1800cc class...

[wardy18 33 1 Cars]

ill have to consider it maybe, would be an idea i suppose, not as adrenalin pumpin as playin with the big guns thou

 

will have to see if i can source an already machined out XU9 block as i know a few have been done already saving me the expense!!

[Batfink 201]

I want a 1700cc mi16 as I dont want to be in the higher class if I have a 2.1-2.4 engine.

I think I have worked out what parts I need too I have to increase the bore to 86mm though

[wardy18 33 1 Cars]

what block are u using?!

 

if only i could use the XU10 block, would make life so easy!!