88TSI_Rob Posted April 10, 2004 Report Share Posted April 10, 2004 Here is a quick round up of available piggy back fuel computers. Product: Apexi S-AFC Website: http://www.apexi-usa.com Fuel matrix: 8 x 2 Ignition matrix: None Replace MAF with MAP?: No Programmable by owner?: Yes Est. MSRP in USD: $249 Comments: Allows the fuel curve to be adjusted in 1% increments (+ or - 50% total). Of the 8 RPM programmable points, they must be seperated by 500 RPMs. The fuel curve is segmented into high and low engine loads, giving a programmable 8x2 fuel matrix. Product: Apexi S-AFC II Website: http://www.apexi-usa.com Fuel matrix: 12 x 2 Ignition matrix: None Replace MAF with MAP?: No Programmable by owner?: Yes Est. MSRP in USD: $295 Comments: Allows the fuel curve to be adjusted in 1% increment (+ or - 50% total). Of the 12 RPM programmable points, they must be seperated by 200 RPMs. The fuel curve is segmented into high and low engine loads, giving a programmable 12x2 fuel matrix. Interestingly two fuel maps are offered. One map could be used for race fuel, and the other for normal pump fuel. Can monitor factory engine knock sensor. Product: Greddy E-Manage Website: http://www.greddy.com Fuel matrix: 16 x 16 Ignition matrix: 16 x 16 Replace MAF with MAP?: No Programmable by owner?: Yes Est. MSRP in USD: $435 and up Comments: The E-Manage is very basic without the Support Tool supplement. The Support Tool unlocks advance features. Allows the fuel curve to be adjusted in 1% increments (+ or - 150% total). Of the 16 RPM programmable points, they must be seperated by 1 RPM. The fuel curve is also segmented into 16 different engine loads, giving a programmable 16 x 16 fuel matrix. E-Manage comes with many options that cost extra money to unlock. The ignition timing harness, for instance, allows you modify your spark timing in a 16 x 16 matrix, plus 20 degrees or - 20 degrees in one degree increments. An optional MAP sensor is available, but it still requires the factory MAF sensor to be in place. The MAP sensor allows you to scale the engine load by MAP instead of the TPS for the ignition map. Unfortunately this feature isn't extended to the fuel map. Datalogging is offered. Product: HKS F-Con S Website: http://www.hksusa.com Fuel matrix: 16 x 24 Ignition matrix: Yes, size unknown Replace MAF with MAP?: No Programmable by owner?: No, dealer only Est. MSRP in USD: $1525 Comments: Very little information is published about this product. Mainly because this product isn't intended to be programmed by us, but by the authorized dealer only. The fuel map is a 16x24 matrix. The timing map size is unknown, but the timing is limited to + or - 15 degrees. The MSRP price was listed at $775, but it's now listed at $1525 MSRP. This makes it the most expensive piggyback unit out there. Product: HKS S-AFR Website: http://www.hksusa.com Fuel matrix: 11 x 1 Ignition matrix: None Replace MAF with MAP?: No Programmable by owner?: Yes Est. MSRP in USD: $245 Comments: Allows the fuel curve to be adjusted in 1% increment (+ or - 50% total). Of the 11 RPM programmable points, they must be seperated by 50 RPMs. HKS doesn't seperate the fuel points when it comes to low/high engine load. Instead they overlay another set of fuel points that they refer to as "response". This response is composed of 6 RPM programmable points. Visualizing the overall correction can be confusing. Link to comment Share on other sites More sharing options...
88TSI_Rob Posted April 10, 2004 Author Report Share Posted April 10, 2004 Continued... Product: HKS VPC Website: http://www.hksusa.com Fuel matrix: NA Ignition matrix: None Replace MAF with MAP?: Yes Programmable by owner?: Yes Est. MSRP in USD: $1200 Comments: Removes the factory MAF and replaces it with a MAP sensor. Injector sizes are limited to what PROM chips are available from HKS. Majority of the fuel correction is done in the PROM. The controls that the HKS VPC offers are limited to fine tuning only. Unfortunately, they are not adequate. HKS has now discontinued this product line. Product: Map ECU Website: http://www.powerhouseracing.com Fuel matrix: 22 x 19 Ignition matrix: None Replace MAF with MAP?: Yes Programmable by owner?: Yes, PC needed Est. MSRP in USD: $895 Comments: One of the newest fuel computers. It allows the fuel curve to be adjusted in 1% increment (+ or - 100% total). The 22 RPM points are not programmable, they are predefined from 0, 200, 400, up to 8000 RPMs max. The fuel curve is also segmented into 19 different, predefined engine loads, giving a programmable 22x19 fuel matrix. This unit removes the MAF and replaces it with a MAP sensor. Offers a self learn feature that will automatically populate the fuel map for you. This is an excellent feature not offered by any other product. Supports datalogging, and can also datalog an external wideband O2 sensor. Product: Split Second ARCII Website: http://www.splitsec.com Fuel matrix: NA Ignition matrix: None Replace MAF with MAP?: No Programmable by owner?: Yes Est. MSRP in USD: $1100 Comments: Allows crude fuel curve tuning. Visualizing the overall correction is difficult. The MAF is replaced with a bigger MAF. The unit is very pricey. Product: Unichip Website: http://www.dastek.co.za/ Fuel matrix: 17 x 12 Ignition matrix: 17 x 12 Replace MAF with MAP?: No Programmable by owner?: No, dealer only Est. MSRP in USD: $695 Comments: The 17 RPM points are defined from 500 to 8000 RPMS. It is not known how much correction is possible. The fuel curve is also segmented into 12 different engine loads, giving a programmable 17x12 fuel matrix. Timing correction is possible with a 17 x 12 matrix. The maximum correction again is not known. Unfortunately, the unit is not programmable by the owner. Link to comment Share on other sites More sharing options...
JustPaus_88TSi Posted June 2, 2004 Report Share Posted June 2, 2004 Damn, this is some good info..How'd I miss it? Bump! Link to comment Share on other sites More sharing options...
ilikestarion Posted June 2, 2004 Report Share Posted June 2, 2004 i was looking for some info like this. THANK YOU SO MUCH!!!!!!!!!!!!! i'm sure a billion people on this board will get good info from this and use it to purchase their fuel computers. THANKS!!! Link to comment Share on other sites More sharing options...
JustPaus_88TSi Posted June 2, 2004 Report Share Posted June 2, 2004 All the props go to 88tsi_rob.. I just go deep into sections to see what's buried.. There's ALOT of info here, I think i'm gonna start asking a mod to put certain posts into the FAQ's... *ahem* boosted_one *cough* hint, hint Link to comment Share on other sites More sharing options...
revlovin Posted June 24, 2004 Report Share Posted June 24, 2004 This is the one I have 034efi 130$ laptop programable capable of four individual injectors boost and or rpm triggered It works well and easy to use Link to comment Share on other sites More sharing options...
88TSI_Rob Posted June 24, 2004 Author Report Share Posted June 24, 2004 I thought 034EFI makes stand-alone ECUs, do they make a piggy-back computer as well? Link to comment Share on other sites More sharing options...
heefner Posted June 25, 2004 Report Share Posted June 25, 2004 Nice work Rob. I think Skunk has a piggy back unit also thats in the sub $500 catagorey. Link to comment Share on other sites More sharing options...
Dcrasta Posted June 25, 2004 Report Share Posted June 25, 2004 I just found this looks good http://www.plxdevices.com/ Im thinking the datalogging wireless one looks awesome for tuning purposes. That and a 1gen MAS translator and you could get it right. I might have to make the plunge once I get my car running right. Link to comment Share on other sites More sharing options...
Dcrasta Posted June 25, 2004 Report Share Posted June 25, 2004 Ok not meaning to be a post ***** but this looks good too! http://www.plxdevices.com/NB_WB_GaugeConv.htm Link to comment Share on other sites More sharing options...
jinx Posted June 26, 2004 Report Share Posted June 26, 2004 add perfectpower.com smt6 piggyback to the list. Costs the same as a safc but does fuel AND timing, laptop programmable. You can lock your distributor/ junk the weights and springs Link to comment Share on other sites More sharing options...
yokomo Posted October 30, 2004 Report Share Posted October 30, 2004 so i got a SAFC for free, and uh, how the hell do i hooh it up, i hate wires. anybody do this yet? Link to comment Share on other sites More sharing options...
JustPaus_88TSi Posted October 30, 2004 Report Share Posted October 30, 2004 http://www.starquestclub.com/index.pl?boar...;num=1062651101 Link to comment Share on other sites More sharing options...
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