8V Tu Questions

[MiniGibbo 142]

Right im looking at changing my bottom end.. (im unsure of my current engines ring condition)

 

 

Ive been talked into changing the bottom end for a 1400 unit as it would be rude not too.. at the moment my options seem to be,

 

1400 ally block saxo/106 with flat pistons.. ive been told the drop in compression isnt noticable.

 

1600 cast iron block from a xsi/vtr with domed pistons.. more power but more weight, how much weight im unsure of.

 

 

 

The one thats confusing me though is apparently the s1 106 1400 xsi as its a 1400 with domed pistons, im getting mixed opinion on wheter its a ally block or cast block though..

 

 

Opinions..?

 

 

 

 

My current engine is a s1 106 rallye engine and i plan to re use my head.

[MiniGibbo 142]

Ive since found out ally and iron blocks are 15kg different

[welshpug 1,627]

yup, a significant lump, an iron TU isn't that far off an alloy XU!

[allye 530 3 Cars]

Going to all the effort of building another engine which isn't going to see a huge amount more than the 105(?)hp of a 1.3i seems a bit odd, rebuild your engine, they are great little motors.

[MiniGibbo 142]

Well the ally blocks are 90kg, 1600 8v are 105kg and the 16v 1600 are 120kg..

 

I thought the 16v tu was just lighter than the gti6 engines..?? That would mean even the iron 8vs are a good 20kg lighter.

 

 

@Allye, my heads got to come off anyway dude so the engine is half way out as it is.. So for the little extra cost some more cc seemed rude to pass up lol.

 

I've been lead to believe they can make anywhere upto 120hp with my head and breathing mods. I'm dubious though and think 105-107 would be more on the money.

 

Edit: mine should be 100hp now.

Edited June 26, 2012 by MiniGibbo

[Sandy 189]

It's more like 23kg between alloy and iron 8v TU. XSi 1.4 and AX GTI blocks are iron. The 16v TU is barely any different in weight to alloy XU 16v and the 1800 16v EW is slightly lighter than 16v TU.

[MiniGibbo 142]

What would you recommend I go for, you'd know a hell of lot more than me..

 

Ally 1400 with flat pistons.

 

Iron 1400 with dommed pistons.

 

Iron 1600 with I'm guessing dommed if you can get single plugs with dommed..?

[Miles 331 1 Cars]

The main thing before deciding personally is what you want from the car, then Budget & go from there

[MiniGibbo 142]

I reackon,

 

100 for a bottom end

100 for gaskets/seals/belts

100 for some bbm mounts

 

And some spanner time..?

 

I only use the car for enthusiastic sunday drives and for a few hundred it's worth a go

 

Edit: If I strip the front end at the same time it would be a good time to get my inner wings changed, and it's about the time I penciled it in with the bodyshop as I wanted to get FCS and pugfest out of the way first.

Edited June 26, 2012 by MiniGibbo

[allye 530 3 Cars]

If it was me, I'd rebuild your 1.3 so its healthy and stick some twin 40's on or some bike carbs for some bwarp (or take out a lone and stick some jenveys on! )

[MiniGibbo 142]

Looked at an at speed throttle body kit but I don't plan to spend that much on it.

 

If I want speed I'll drive the other whip

[welshpug 1,627]

GSXR bodies, much better, Sandy+Colin mani of course.

[MiniGibbo 142]

Again I don't want to spend that much lol

 

 

[tdr_1976 41 1 Cars]

I've nad my XS for almost 3 years now & have spent a few quid getting the engine up to scratch.

 

First, I fitted a pipercross air filter, then a 4-2-1 Manifold with stainless steel system, once that was done, I stripped the head, got it pressure tested and skimmed, did some slight porting work on it, new stem seals, re ground the valves, fitted a kent PT02 camshaft with kent vernier pulley, re fitted it all with new seals head bolts and got the timing sorted and it went like s*it off a shovel.

 

Two weeks ago, I fitted a set of twin 40 Dellorto DRLA carbs on it, and now it's bloody fantastic to drive and pulls more like a 1.9 than a 1360!

 

My suggestion is to stick with the 1360. With a decent manifold, cam, headwork and a set of good bike/ webber/ Dellorto carbs you can have a pocket rocket!

 

I love this, and I'm already looking at getting the crank and flywheel balanced in the new year to help it rev a bit easier.

 

Edited June 26, 2012 by tdr_1976

[MiniGibbo 142]

The main idea behind a new bottom end was if my rings are shagged..

 

It's never going to be fast but the experience and enjoyment I hope to achieve from it I think it's worth it.

 

And even if I bugger the lot up it's not going to brake the bank.

 

I'd like to say ill never fit bodies to it (I'd never for carbs) but going on my previous with cars, "short term, on a budget" cars never last and I always plow too much money into them..

[MiniGibbo 142]

What's the 205 xs, ally or iron.?

[jonXS 30 1 Cars]

its all ally

[jonXS 30 1 Cars]

its all ally

[tdr_1976 41 1 Cars]

Yes, it's the Alloy TU3S, they fitted the same engine in the AX GT.

[MiniGibbo 142]

Cheers.

[custard-rallye 25]

Get a 16v bottom end or 8v 1600 with 16v pistons buy a 645 catcam and get sandy to cut out the pistons

[MiniGibbo 142]

The 16v tu bottom end dosent go with a 8v head.

 

I think I've found the engine I want now..

 

 

[custard-rallye 25]

That would make a fun car

[custard-rallye 25]

I'm sure the 16v bottom end does if not a 8v with 16v pistons will up the compression