hello 
new to tuning and modified imports that need a dyno tune.  
i was wondering with the modifications done to my engine, if i need just the S100 or if i need the S300
the platform is a B17a1 in a 1990 Acura Integra LS 
here is a list of mods done to the engine
Aspiration - N/A
Air intake - AEM short ram
Throttle Body -  Professional Products 65mm 
Intake Manifold - Professional Products Whirlwind GSR intake
AEM - High Flow Fuel Rail
Fuel Injectors - Acura RDX 410cc injectors
Head and cams are stock spec
Block 
- JE 12.5:1 pistons 
- ACL Race series main and rod bearings
- Micro-polished and balanced crankshaft 
Exhaust
 - no name aftermarket 4-2-1  2 piece header 
- OBD1 O2 sensor
- Stock fuel pump
- stock fuel pressure regulator
is this enough information to determine which hondata unit i need for the engine to run properly  
i am on a budget and this will be my daily driver, ive been without a car for over 6 months now trying to get this car road worthy.  YES of course id love to buy the S300, BUT is it truly necessary for my applications
			
			
									
						
										
						do i need an S100 or the S300
Re: do i need an S100 or the S300
To use a Hondata system, you will need to use a compatible OBD1 ecu from the list at http://www.hondata.com/ecus.html . You can then use the Hondata s100 or s300 depending on what options you want ( http://www.hondata.com/sproducts.html ). I would recommend the s300.