2.1 revving capabilites are better from what i understand. I think budget wise a 2.1 is also a bit more friendly.

Alan, the 2.1 short block, £2150, does it come with the RCM oil pump, a set of head gaskets and ARP heads studs or are they at extra cost and if so, how much more?

 

This is my take on it.
The 2.5 feels faster initially, but it isn't. On the road, it has an effortless quality for sure, but most turbos don't suit the engine that well, giving a big slug of power that tails off. If you go the whole hog with a GT35/42 and big valves/flowing/cams they will deliver the excitement, as in 700 bhp plus from one we built!
Most customers can't afford that, and we found that the delivery from the 2.1 is much better. Take a look at the graph in the first post and note how the power holds right up to the end of the rev range, with no sudden drop off. It's hard to get a graph like that from a 2.5 without spending large sums on one.
A guy local to us, serious about his drag racing, ditched his 2.5 and went for one of our 2.1's. He's now in the 10 second area! Answers it all really.

 

And as a special offer, we're also giving free tickets to see "Susan Boyle; The Subaru Years.."

Blimey, you don't want much do you?

RCM pump £199.75 inc vat
Cosworth head gaskets £112.64 inc vat (pair)
ARP studs £199.75 inc vat.
Inevitably there's a bit of carriage as well, due to all that movement around the country...

 

Alan, can you advise what the typical torque level is on one of your S-CDB 2.1L builds is please. (the build you offer for £4150)

 

Well, that's up to the turbo supplier and mapper! it's just better than it would be as a 2 litre. I think the graph at the start has the best we've had so far, if that's any indication.

 

As the owner of the car that made the graph at the start of the thread, I thought I'd throw in my 2p...

The best advice that I've heard so far this year is Alan saying, just as I was about to pull away from EngineTuner, 'Be sensible on the way home'. The amount of power, and how long it's available for, is incredible! I've never driven a 2.5, so I can't really comment on the difference, but all I can say is that I'm extremely happy with the result!

This is the second time that I've let Alan, Martyn, and the Enginetuner elves, poke around my car, and both times I've left with a big smile!

 

I flatly deny any suggestion of Elf Poking..

 

Ooops! Sorry Alan, I didn't mean to divulge your hobby to the public

 

Stu, I couldn't have aspersions cast by a better customer!

 

my94 sti wagon, closed deck block as standard, what would 5k get me????

 

A cup of coffee for starters!
Plus a 2.1 stroker drive in drive out, and most of a Simtek ECU to map it with.
It all depends where you want to go with it after that.
If you chose to stick around 400 bhp, I'd buy the CDB off you as you don't need one at that level, for example. That would give you more cash to spend on other bits.

 

already have simtek fitted its being mapped on tuesday next week, following base map on friday last. got hybrid front mount, walbro fuel pump, rcm induction kit with 70mm trumpet and full 2.5 inch decat exhaust running standard td05 16g turbo and a load of chassis mods which are irrelevant i guess.

 

In that case, go for the stroker and move on from there.

 

Thanks for the explanation alan. That has just swayed me in the 2.1 direcion. Which at the price your doing them at is great.

Tempo

 

Here's one on the move. Our Francis at Mallory having a great time. 2.1 stroker on open deck block, over 500 bhp!

 

I Like it

 

I didn't mean that to sound derogatory! There is definitely a case for using what you need and not much more. We see a lot of cars plastered in fancy bits they don't require, and of course the money could have been more wisely spent.
There is an expression about "more than a handful's a waste" although, thinking about it, I also harbour "large handful" tendencies!
Complicated world, isn't it?

 

Alan if you dont mind me asking at what boost was the power on the graph made?

And if you dont mind me asking what is the compression ratio on that built motor?

 

wouldnt want to get rid of cdb for anything else to be honest as its just extra piece of mind for me to know its there, would i be able to upgrade turbo within the 5k and if so what would i get?? and what sort of power would the car be putting out once mapped to suit the 2.1 and whichever turbo you reccommend.

thanks

steve

p.s ya can never give me enough coffee!!!!! lol

 

Had my 2.1 mapped yesterday by JGM at Surrey RR and had fantastic results. It made 438.bhp and 410lbft at just 1.45bar on a MD321T and it makes 360bhp at just 1bar

Simon said (no pun intended ) that the engine made the power easily and that the turbo pulled strongly as well.

Goes like a b***ard on the road



Thanks again to Alan and the boys at EngineTuner

 

Great result Marcus you must be very pleased with that, good choice of turbo the md

How quick in the rev range does it reach full boost?

 

marcus7 what heads are you running on your 2.1 please and what injectors many thanks stephen

 

Holding 2 bar flat on the high boost map. C/R 8.5 to 1.

 

OK, you can keep the CDB...
You don't have quite enough for a proper turbo as well, but you could always go for the 2.1, run it in nicely, and change the turbo at a later date.
Turbo Technics are working on a new one, which sounds like a winner in the up to 400 bhp range. Hopefully, it won't be too long!

 

Nice one Marcus, very pleased with that! thanks for the business..

 

Some very good results here alan.

Tempo

 

by proper turbo, what do you suggest and how far out am i money wise????

 

Just to add another few questions into the mix....

Cosworth inlet manifold... your thoughts?? Worth trying to factor into a 2.1 build with relevant turbo (looking for 450ish).

Hard to find any info or hard facts on the cosworth inlet, few bits i have seen, seem to suggest that they dont work that well until your making 600+ bhp. Tho i read that on a US forum, so they have lower octane fuel, talk ****, smell etc etc

 

Personal opinion, the Cosworth inlet manifold wouldn't make a fantastic difference at 450hp, certainly not worth the expense at that power band

 

so what i have read about them not working that well/efficiently until really big numbers would seem to be true then.

I will scrub that off my list then! lol