In my experience, I have used a carbon sealed t25 turbo and a cd 175 stromberg carby off a sigma turbo. Very simple setup suck through setup, not too expensive, it's easy to remove if needed but I don't know how it goes as it's not finished. If this goes well I won't go efi. The most expensive part has been forged pistons and getting the turbo carbon sealed.

thank you to every one who had an imput to my problems you have convinced me to go suck through all i need to do now how to go fuel injection .....it is not going to be easy thankyou all again
moridat

post turbo pipe is the one that ices up mate. The one the fuel is intercooling ;)

in fact if your pre-turbo piping is icing up the only cause of this would be extremely high air speeds, perhaps it is a good indicator that you need to increase your piping sizes pre-turbo as this may be restricting your system

L18_B110

some people like myself really appreciate the sound of a blow off valve, it add's to the experience and brings a smile to your face when you hear that noise coming from an a-series (and they are a throw away item so cost is not a factor)

the "a bit flat" was in reference more to carby vs. EFI really, the possibilities to tune for on-boost and off-boost with EFI means you can have the best of both worlds, where the carby setups tend to be setup as a compromise or either for on-boost or off-boost. More technically put - the area under the power/torque graph is going to be much larger with EFI

inlet pipe temp is not so important (even if it is icing up) it's the post turbo/inlet to engine temp that is critical, the turbo is the heater in the system and if you can't cool that air post turbo you are going to lose out somewhat

Over a month ago I ran into a nice old Ke25 rolla with 4k (like A14) suck through on e10, it was a daily and goes like stink behind the old foot of a 70s plus grampa who lives in Grafton but visits his grandkids in Brissie & Maldon Vic twice a year.
He said he had it on e85 but prefers the e10 for economy and no big detours through Camby like he had made from Sydney to Melbourne last Xmas as e85 was not available on the Hume.

The non crossflow head of the A series lends itself well to suck through going blow T is just big $$$$ and few people have the $$$$ or the inclination do a good blow T A series right through till its right.

The ones that have proper BlowT setups have made big hp but the complexity & $$$$ shouldnt interest most datsun folk who prefer budget hp and fun

Quote:

Suck through means there is absolutely no need for a blow off valve! It's just one example of the extra complexity and cost of the blow-through setup.

Intercoolers - the inlet pipe will actually frost up on a draw thru setup. You won't see that happen with blow through or EFI.

Draw through setups are not 'a bit flat' when not on full throttle. That's just nonsense.

Quote:

The draw through setups I've done have no flat spots or hiccups. My current setup is torquey and very smooth. As was the last A12 setup I did. And I'd imagine the factory draw through setups on thing s like Sigma turbos, DJR XE Falcon turbos etc didn't suffer these problems you're talking about either.

EFI is the best way to go, but draw through is the next best thing. Boxed carbs or hats, rising rate fuel regs and all the other bullshit is just unnecesary complexity, more difficult to tune and more stuff to go wrong - like blowing up fuel bowls! lol

all my different setups are in my photo album on this website, have a browse if your interested

all my setups were blow through twin turbo, the efi was using the factory efi with delco ecu and sensors off an old camira

i used to discuss it heaps on here, you should be able to find a fair bit of info

like i started with - it depends what you want, if you want to spend good money and get a really neat setup then go straight to efi blow through

if you easiest and bang for buck go suck through

suck through means you cant run intercooler or blow off valve, but you can easily get a 40% increase in power at full throttle but perhaps be a bit flat in other situations with say 7psi boost safely

if you want 100% increase in power and good smooth power delivery across the range of revs with no flat spots or hiccups then you really want EFI

thank you its in a morris minor what did the efi system come off i think we have comunicated before this is all new to me and i thank you for your help i was thinking of addapting a hyundi or some thing similar my car is a54 morris ute or it use to be
thanks again we will get howled down but we are using datsun motors as they are so good
moridat

Photo of suck through and efi

Go suck through its easier

Attach file:

---

  20140705_100229.jpg (129.38 KB)


  20131020_133351.jpg (135.51 KB)